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Artykuły w czasopismach na temat „Boron-Nitrogen Compounds”

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Data publikacji: 6 września 2023

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1

Mariategui, J. Francisco, i Kurt Niedenzu. "Boron-nitrogen compounds". Journal of Organometallic Chemistry 369, nr 2 (czerwiec 1989): 137–45. http://dx.doi.org/10.1016/0022-328x(89)88001-5.

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2

Köster, Roland, Günther Seidel, Susanna Kerschl i Bernd Wrackmeyer. "Atropisomerism in Boron-Nitrogen Heterocycles/Atropisomerism in Boron-Nitrogen Heterocycles". Zeitschrift für Naturforschung B 42, nr 2 (1.02.1987): 191–94. http://dx.doi.org/10.1515/znb-1987-0212.

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Abstract Atropisomerism owing to hindered rotation about the N-aryl bond is observed in 4,5-diethyl-2,2,3-trimethyl-1-(o-trifluormethyl)phenyl-2,5-dihydro-1H-1,2,5-azasila-(2) and -azastanna-boroles (5). The compounds 2 and 5 are characterized by elemental analysis, mass spectra and 1H, 11B, 13 C, 29Si and119Sn NMR. The ortho-trifluoromethyl group serves as an additional NMR spectroscopic probe because of “through space” 19F-1H and 19F-13C spin spin coupling. Compound 5 is the first derivative of a 2,5-dihydro-1H-1,2,5-azastannaborol.
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3

Clarke, C. M., M. K. Das, E. Hanecker, J. F. Mariategui, K. Niedenzu, P. M. Niedenzu, H. Noeth i K. R. Warner. "Boron-nitrogen compounds. 113. Boron-halogenated pyrazaboles". Inorganic Chemistry 26, nr 14 (lipiec 1987): 2310–17. http://dx.doi.org/10.1021/ic00261a029.

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4

Lötz, A., J. Voitländer, D. Stephenson i J. A. S. Smith. "Nuclear Quadrupole Double Resonance of Compounds with Transannular Boron—Nitrogen Bonds". Zeitschrift für Naturforschung A 41, nr 1-2 (1.02.1986): 200–202. http://dx.doi.org/10.1515/zna-1986-1-233.

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The boron and nitrogen nuclear quadrupole double resonance spectra of several ring compounds with transannular boron-nitrogen bonds are reported. The electron donation from nitrogen to boron as seen by their quadrupole coupling parallels the boron-nitrogen bond lengths. One of the compounds exhibits a transannular valence topomerisation between two identical boron-nitrogen pairs in solution which is frozen in the solid state but may possibly exist in a preformed state of this equilibrium from its quadrupole coupling. The oxygen-boron π-bond in boroxines, whose extent is deduced from the quadrupole coupling in one of the compounds with a boroxine-like structure at boron and in (PhBO)3, is approximately half as strong as the nitrogen-boron π-bond in borazine.
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5

Bai, J., i K. Niedenzu. "Boron-nitrogen compounds. 126. N-triazolylboranes". Inorganic Chemistry 29, nr 23 (listopad 1990): 4693–96. http://dx.doi.org/10.1021/ic00348a021.

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6

Stepina, Irina, Aleksey Zhukov i Sofia Bazhenova. "Modification of Cellulosic Materials with Boron-Nitrogen Compounds". Polymers 15, nr 13 (23.06.2023): 2788. http://dx.doi.org/10.3390/polym15132788.

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Wood fiber and its products are modified to increase fire and bio-resistance. The best results are achieved by using modifiers that enter into chemical interaction with the hydroxylated substrate, forming the organic matrix of the materials. The purpose of the research described in the article was to study the possibility of using boron-nitrogen compounds to modify cellulose and cellulose-containing materials to improve the performance, bio- and fire-protective properties of construction materials, as well as to optimize the consumption of boron-nitrogen compounds. As a result of the research, it was found that the boron-nitrogen compounds used in the compositions developed here chemically interact with hydroxyl groups at the C6-atom of cellulose. The chemical interaction of boron-nitrogen compounds with cellulose is an inter-crystalline process occurring without destruction of the crystal structure of the substrate since the modifier molecules bind with the more accessible hydroxyl groups of the amorphous regions of cellulose. Thus, surface modification with boron-nitrogen compounds does not result in accelerated aging of cellulose-containing materials and loss of strength but, on the contrary, increases the durability of wooden structures.
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7

Niedenzu, Kurt, Philipp M. Niedenzu i Kim R. Warner. "Boron-nitrogen compounds. 105. Boron derivatives of 3-methylpyrazole". Inorganic Chemistry 24, nr 10 (maj 1985): 1604–6. http://dx.doi.org/10.1021/ic00204a041.

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8

Wang, Guodong, Jing Suming, Guoqing Liu i Xingyong Gao. "Review on the Synthesis and Properties of the Energetic Compound Containing Boron". Current Organic Chemistry 24, nr 10 (11.08.2020): 1097–107. http://dx.doi.org/10.2174/1385272824999200516180719.

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Boron possesses the second greatest heating value of any element that can be adopted as an energetic material in the processing of propellants and explosives. It has become the first choice as a high energy fuel for solid fuel-rich propellants because of its advantages of high theoretical combustion heat. In the actual condition, the combustion efficiency of boron-containing fuel-rich propellants is low, and the potential energy of boron cannot be fully utilized. The compound containing-boron can be used as a new way to improve the combustion efficiency of fuel-rich propellants. In this paper, the progress in the synthesis of energetic borides is reviewed from the perspectives of molecular design, synthesis strategy and route optimization. The situation of the synthesis methods of energetic borides (nitrogen-rich boron esters, poly(azole)borates, nitroboranes, nitrogen-rich borazines and azide boron compounds) is reviewed. The research focus and development trend of various boron compounds are analyzed, and the potential application prospect in the propellant is investigated.
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9

Paciorek, K. J. L., R. H. Kratzer, P. F. Kimble, J. H. Nakahara, K. J. Wynne i C. S. Day. "Boron-nitrogen polymers. 3. Nitrogen- and oxygen-bridged compounds". Inorganic Chemistry 27, nr 14 (lipiec 1988): 2432–36. http://dx.doi.org/10.1021/ic00287a013.

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10

Habben, C., L. Komorowski, W. Maringgele, A. Meller i K. Niedenzu. "Boron-nitrogen compounds. 119. Reactions of boron heterocycles with pyrazole". Inorganic Chemistry 28, nr 13 (czerwiec 1989): 2659–63. http://dx.doi.org/10.1021/ic00312a031.

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11

Olliges, J., A. Lötz, J. Voitländer, H. Barfuss, G. Böhnlein, F. Gubitz, W. Ittner, G. Lanzendorfer, W. Kreische i B. Röseler. "Boron, Nitrogen, and Fluorine Nuclear Quadrupole Coupling and the Electronic Structure of the Boron—Nitrogen Single Bond". Zeitschrift für Naturforschung A 41, nr 1-2 (1.02.1986): 203–5. http://dx.doi.org/10.1515/zna-1986-1-234.

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The 11B and 19F nuclear quadrupole couplings in F3BNHx(CH3)3-x compounds are reported. The boron quadrupole couplings were measured by quadrupole perturbed NMR in the solid state. The fluorine quadrupole couplings were obtained by the time-differential observation of the angular distribution of the gamma radiation after excitation of the fluorine nuclei with accelerated protons (TDPAD). The results are discussed in connection with the nitrogen quadrupole couplings in F3BNHxR3-x compounds, and the nitrogen and boron quadrupole couplings in H3BNHxR3-x: compounds which were previously determined by nuclear quadrupole double resonance. In the F3BNHxR3-x series of compounds, the donor-acceptor character of the B -N bond appears to be less im portant than in the H3BNHxR3-x compounds in favour of a more ionic character of the bond with a higher negative charge on nitrogen.
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12

Hanecker, E., T. G. Hodgkins, Kurt Niedenzu i H. Noeth. "Boron-nitrogen compounds. 100. Bromination of pyrazabole". Inorganic Chemistry 24, nr 4 (luty 1985): 459–62. http://dx.doi.org/10.1021/ic00198a005.

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13

Wei, Hai Ying, Hua Yan Zhang, Wen Ming Zhang, Shu Ming Wang, Jun Ying Xiao, Tong Cui, Yun Ping Bai, Han Shuang Niu, Tian Tian Li i Xiao Wei Li. "Facile Synthesis and Photocatalytic Properities of Mini Nanoparticle CdS Quantum Dots/Boron and Nitrogen Co-Doped TiO2 Transparent Photocatalyst Emulsion". Advanced Materials Research 1088 (luty 2015): 33–37. http://dx.doi.org/10.4028/www.scientific.net/amr.1088.33.

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CdS quantum dots/ Boron and Nitrogen co-doped TiO2 photocatalyst emulsions were synthesized by a complexation-controlled hydrolysis method at room temperature. Boron compounds and Nitrogen compounds were added to TiO2 precursor solution, and CdS quantum dots were attached to TiO2 particles surfaces by using chemical reaction. The hybird composite photocatalysts were characterized by XRD, UV-Vis. Their photocatalytic properties were evaluated through the degradation of acid red 3R dye. The results indicate that when TiO2 emulsion add to Boron ions, Nitrogen ions, and CdS quantum dots, the photocatalytic performance of the emulsion is the best.
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14

Wei, Hai Ying, Yun Ping Bai, Hua Yan Zhang, Ze Xin Liu, Tian Tian Li, Han Shuang Niu, Ling Li, Wen Ming Zhang i Xiao Wei Li. "Facile Synthesis and Photocatalytic Properities of PbS Quantum Dots/Boron and Nitrogen Co-Doped TiO2 Transparent Photocatalyst Emulsion". Advanced Materials Research 1089 (styczeń 2015): 129–32. http://dx.doi.org/10.4028/www.scientific.net/amr.1089.129.

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PbS quantum dots/ Boron and Nitrogen co-doped TiO2 photocatalyst emulsions were synthesized by a complexation-controlled hydrolysis method at room temperature. Boron compounds and Nitrogen compounds were added to TiO2 precursor solution, and PbS quantum dots were attached to TiO2 particles surfaces by using chemical reaction. The hybird composite photocatalysts were characterized by nanoparticle size analyzer. Their photocatalytic properties were evaluated through the degradation of acid red 3R dye. The results indicate that when TiO2 emulsion added to Boron ions, Nitrogen ions, and PbS quantum dots, the reflux time is 15 min, the photocatalytic performance of the emulsion is the best.
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15

Niedenzu, Kurt, i K. R. Woodrum. "Boron-nitrogen compounds. 121. Triazaboles and related triazole derivatives of boron". Inorganic Chemistry 28, nr 21 (październik 1989): 4022–26. http://dx.doi.org/10.1021/ic00320a017.

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16

Boniardi, Marco Virginio, Andrea Casaroli, Laura Sirangelo, Sergio Monella i Michele Mazzola. "Failure Analysis of Boron Steel Components for Automotive Applications". Frattura ed Integrità Strutturale 17, nr 64 (21.03.2023): 137–47. http://dx.doi.org/10.3221/igf-esis.64.09.

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The automotive industry is continuously looking for an innovative mix of new steels and manufacturing techniques in order to improve process chain efficiency and cost reduction. To this aim, boron steels are becoming increasingly popular thanks to their high hardenability and machinability. Due to their reduced finishing steps, boron steels are commonly processed using fine blanking technologies. The success of fine blanking on boron steel components is due to heat treatments which must be carefully designed to avoid precipitation of boron-rich compounds that would lower steel hardenability. At high temperature, boron is very reactive with oxygen and nitrogen. The main focus of this paper is to show some drawbacks that can occur during heat treatments of automotive components. An experimental campaign was performed on two different boron steels, namely EN 34MnB5 and EN 22MnB5. The steel samples were previously spheroidized annealed in a neutral environment (hydrogen/nitrogen atmosphere), and then fine blanked to obtain specific automotive components which were subsequently quenched and tempered. Experimental tests revealed precipitation of nanometric compounds, causing strong grain refinement and localized decrease of steel hardenability. Hardenability problems were brought back to nitrogen pick-up during initial spheroidize annealing treatments.
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17

Kumar, Rahul, Abhi Karkamkar, Mark Bowden i Tom Autrey. "Solid-state hydrogen rich boron–nitrogen compounds for energy storage". Chemical Society Reviews 48, nr 21 (2019): 5350–80. http://dx.doi.org/10.1039/c9cs00442d.

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18

Das, M. K., J. F. Mariategui i Kurt Niedenzu. "Boron-nitrogen compounds. 114. Hydrazine complexes of B-triorganoboroxins". Inorganic Chemistry 26, nr 19 (wrzesień 1987): 3114–16. http://dx.doi.org/10.1021/ic00266a011.

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19

Komorowski, L., i Kurt Niedenzu. "Reactions of N,N'-dimethylurea with boron-nitrogen compounds". Inorganic Chemistry 28, nr 4 (luty 1989): 804–6. http://dx.doi.org/10.1021/ic00303a039.

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20

BAI, J., i K. NIEDENZU. "ChemInform Abstract: Boron-Nitrogen Compounds. Part 126. N-Triazolylboranes." ChemInform 22, nr 9 (23.08.2010): no. http://dx.doi.org/10.1002/chin.199109257.

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21

Schurz, Fanny, i Martin Jansen. "Pyridine-promoted Cyclization of Functionalized N-Silylated Boron-Nitrogen Compounds". Zeitschrift für Naturforschung B 66, nr 12 (1.12.2011): 1225–30. http://dx.doi.org/10.1515/znb-2011-1205.

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Dichloroboryldisilylamines [SiClm(CH3)3−m]N[Si(CH3)3](BCl2) (m = 1 - 3) as well as chloromethylboryl- bis-(chlorodimethylsilyl)amine [SiCl(CH3)2]2N[BCl(CH3)] form 1 : 1 adducts with pyridine (1 - 4). Those with m = 2 and 3 have been converted into functionalized diazadiboretidine derivatives which are still coordinated by pyridine: [(SiClm(CH3)3−m)NBCl · Py]2 (5: m = 2, 6: m = 3). Single-crystal X-ray diffraction structure analyses confirm the presence of planar, rhombusshaped, four-membered boron-nitrogen rings with tetra-coordinated boron atoms and nitrogenbonded, chlorine-functionalized silyl groups, for both compounds.
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22

Wrackmeyer, Bernd. "Methylaminodiphenylborane — Application of 11B, 13C, 14N, 15N NMR". Zeitschrift für Naturforschung B 41, nr 1 (1.01.1986): 59–62. http://dx.doi.org/10.1515/znb-1986-0112.

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11B, 13C, 14N, 15N NMR is used to study methylaminodiphenylborane (1). Compound 1 can be regarded as a model compound for studying BN(pp)π-. BC(pp)π interactions, for determining the barrier to rotation about the B-N bond and for the application of natural abundance 15N NMR to boron-nitrogen chemistry. The 13C NMR of 1 shows a large splitting of the 13C(para) resonances (in contrast to reports on similar compounds in the literature) as a consequence of hindered rotation about the BN bond. The difference in the 13C(para) nuclear shielding indicates different mesomeric interactions between the trigonal boron atom and the two phenyl groups.
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23

Contreras, Rosalinda, i Nerberto Farf�. "New Boron Heteropentacyclic Compounds of C2 Symmetry Bearing Two Chiral Atoms: Nitrogen and Boron". HETEROCYCLES 23, nr 12 (1985): 2989. http://dx.doi.org/10.3987/r-1985-12-2989.

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24

Bielawski, J., T. G. Hodgkins, W. J. Layton, K. Niedenzu, P. M. Niedenzu i S. Trofimenko. "Boron-nitrogen compounds. 109. Polynuclear pyrazolyl-bridged spiro species containing boron and metal centers". Inorganic Chemistry 25, nr 1 (styczeń 1986): 87–90. http://dx.doi.org/10.1021/ic00221a023.

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25

Ivanovskii, A. L. "Microhardness of compounds of rhenium with boron, carbon, and nitrogen". Journal of Superhard Materials 34, nr 2 (kwiecień 2012): 75–80. http://dx.doi.org/10.3103/s1063457612020013.

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26

Jansen, F. Schurz M. "Pyridine-promoted Cyclization of Functionalized N-Silylated Boron-Nitrogen Compounds". Zeitschrift für Naturforschung B 66 (2011): 1225. http://dx.doi.org/10.5560/znb.2011.66b1225.

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27

Gago, R., I. Jiménez i J. M. Albella. "Boron–carbon–nitrogen compounds grown by ion beam assisted evaporation". Thin Solid Films 373, nr 1-2 (wrzesień 2000): 277–81. http://dx.doi.org/10.1016/s0040-6090(00)01107-x.

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28

Komorowski, L., W. Maringgele, A. Meller, Kurt Niedenzu i J. Serwatowski. "Boron-nitrogen compounds. 125. Pyrazole complexes of three-coordinated boranes". Inorganic Chemistry 29, nr 19 (wrzesień 1990): 3845–49. http://dx.doi.org/10.1021/ic00344a038.

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29

Stepina, Irina V., i Olga A. Klyachenkova. "Biostability of Wood in the Presence of Boron-Nitrogen Compounds". Procedia Engineering 91 (2014): 358–61. http://dx.doi.org/10.1016/j.proeng.2014.12.074.

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30

Luisier, Nicolas, Kurt Schenk i Kay Severin. "A four-component organogel based on orthogonal chemical interactions". Chem. Commun. 50, nr 71 (2014): 10233–36. http://dx.doi.org/10.1039/c4cc03398a.

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31

Stepina, Irina Vasilevna. "Change in Crystalline Structure of Cellulose Caused by Wood Preservation". Materials Science Forum 923 (maj 2018): 51–55. http://dx.doi.org/10.4028/www.scientific.net/msf.923.51.

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Сhemical interaction of cellulose with reactive groups of four-coordinate boron-nitrogen compounds is an intercrystalline process proceeding without destruction of cellulose crystalline structure; probably, the modifier molecules react with easier accessible hydroxyl groups of the amorphous cellulose regions. The formation of B-O-C ether bonds between OH groups of modifiers and more reactive hydroxyl groups of amorphous parts of cellulose results in redistribution of hydrogen bonds and, as a consequence, to rectification of cellulose macromolecules. Thus, when cellulose is treated with compositions based on four-coordinate boron-nitrogen compounds, crystalline structure of cellulose is not disrupted, hence this process can be called a "mild" modification. Such modification does not lead to accelerated aging of cellulose materials, rapid loss of strength and increases durability of wooden structures.
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32

Stepina, Irina Vasil'evna, Vyacheslav Ivanovich Sidorov i Ol’ga Aleksandrovna Klyachenkova. "Production of Bio-Resistant Wood Materials through the Modification of Wood by Boron-Nitrogen Compounds". Applied Mechanics and Materials 584-586 (lipiec 2014): 1233–36. http://dx.doi.org/10.4028/www.scientific.net/amm.584-586.1233.

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Modifying of the surface of pine wood with aqueous solutions boron-nitrogen compounds was empirically found to provide a 100% biological stability of wood for at least 20 years. Durability of the protective effect of the modifiers developed is due to the formation of hydrolytically stable compounds on the surface of the wood.
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33

YANG, Jian, Tai QIU, Chun-Ying SHEN i Li-Mei PAN. "Photoluminescence of (Boron and Nitrogen)-rich BCN Compounds Pyrolysed from Precursor". Journal of Inorganic Materials 24, nr 1 (16.02.2009): 13–17. http://dx.doi.org/10.3724/sp.j.1077.2009.00013.

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34

Schleier-Smith, M. H., L. D. van Buuren, J. M. Doyle, S. N. Dzhosyuk, D. M. Gilliam, C. E. H. Mattoni, D. N. McKinsey, L. Yang i P. R. Huffman. "The production of nitrogen-13 by neutron capture in boron compounds". Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 215, nr 3-4 (luty 2004): 531–36. http://dx.doi.org/10.1016/j.nimb.2003.09.022.

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35

Komorowska, M., K. Niedenzu i W. Weber. "Boron-nitrogen compounds. 123. Preparation and reactions of bis(aminoboryl) oxides". Inorganic Chemistry 29, nr 2 (styczeń 1990): 289–94. http://dx.doi.org/10.1021/ic00327a028.

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36

Komorowski, L., A. Meller i Kurt Niedenzu. "Boron-nitrogen compounds. 124. Pyrazole derivatives of 9-borabicyclo[3.3.1]nonane". Inorganic Chemistry 29, nr 3 (luty 1990): 538–41. http://dx.doi.org/10.1021/ic00328a040.

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37

Bielawski, J., i K. Niedenzu. "Boron-nitrogen compounds. 110. Reactions of boroxins and diboroxanes with pyrazole". Inorganic Chemistry 25, nr 11 (maj 1986): 1771–74. http://dx.doi.org/10.1021/ic00231a010.

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38

Cernusak, Ivan, Miroslav Urban, Peter Ertl i Rodney J. Bartlett. "C2H4B2N2: a prediction of ring and chain [boron-nitrogen-carbon] compounds". Journal of the American Chemical Society 114, nr 27 (grudzień 1992): 10955–56. http://dx.doi.org/10.1021/ja00053a039.

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39

Xing, Xuan, Xiuping Zhu, Hongna Li, Yi Jiang i Jinren Ni. "Electrochemical oxidation of nitrogen-heterocyclic compounds at boron-doped diamond electrode". Chemosphere 86, nr 4 (styczeń 2012): 368–75. http://dx.doi.org/10.1016/j.chemosphere.2011.10.020.

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40

Ryzhov, Yuriy, i Svetlana Abramova. "MACHINERY OPERATIONAL PROPERTY CONTROL DURING DIAMOND-ABRASIVE FINISHING USING ACTIVE SOTS". Bulletin of Bryansk state technical university 2020, nr 9 (22.09.2020): 13–18. http://dx.doi.org/10.30987/1999-8775-2020-9-13-18.

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There is carried out a number of experiments with the purpose of analyzing SOTS impact upon both finishing productivity, and physical-chemical state and tribological behavior of surfaces machined, and also a possibility for creation according to the results of the investigations carried out a relatively universal micro-emulsion SOTS based on existing in the Ukraine the line of oils, PAV, corrosion inhibitors, alloying additives etc. As SOTS samples there were used both well-known compouds, for example, Camix, Nope Right (USA), and carbamide having in its structure boron, boron-phosphorus-containing additive, water-solvable phosphate, tributyl phosphate (oil-solvable), concentrate SOTS tribol, having in its structure compounds of boron, nitrogen and phosphorous; ethylic ether of fatty acids; methyl ether of colza oil; Sarkozyl-O having in its structure easily-decomposable chlorine compounds. From the results obtained it is possible to draw a conclusion that during finishing in the environment of water-compatible SOTS an important role in the formation of the properties of the surface worked is played by hydrocarbon components and additives which contribute to the formation of the thinnest surface layers modified with carbon and oxygen.
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41

Ryzhov, Yuriy, i Svetlana Abramova. "MACHINERY OPERATIONAL PROPERTY CONTROL DURING DIAMOND-ABRASIVE FINISHING USING ACTIVE SOTS". Bulletin of Bryansk state technical university 2020, nr 9 (17.09.2020): 13–17. http://dx.doi.org/10.30987/1999-8775-2020-9-13-17.

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There is carried out a number of experiments with the purpose of analyzing SOTS impact upon both finishing productivity, and physical-chemical state and tribological behavior of surfaces machined, and also a possibility for creation according to the results of the investigations carried out a relatively universal micro-emulsion SOTS based on existing in the Ukraine the line of oils, PAV, corrosion inhibitors, alloying additives etc. As SOTS samples there were used both well-known compouds, for example, Camix, Nope Right (USA), and carbamide having in its structure boron, boron-phosphorus-containing additive, water-solvable phosphate, tributyl phosphate (oil-solvable), concentrate SOTS tribol, having in its structure compounds of boron, nitrogen and phosphorous; ethylic ether of fatty acids; methyl ether of colza oil; Sarkozyl-O having in its structure easily-decomposable chlorine compounds. From the results obtained it is possible to draw a conclusion that during finishing in the environment of water-compatible SOTS an important role in the formation of the properties of the surface worked is played by hydrocarbon components and additives which contribute to the formation of the thinnest surface layers modified with carbon and oxygen.
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42

MELLER, A., i W. MARINGGELE. "ChemInform Abstract: Controlling Factors in the Formation and Reactivity of Boron-Nitrogen and Boron-Carbon Compounds". ChemInform 28, nr 36 (3.08.2010): no. http://dx.doi.org/10.1002/chin.199736335.

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43

Matveev, E. Yu, S. S. Novikov, V. Ya Levitskaya, A. I. Nichugovskiy, I. E. Sokolov, K. Yu Zhizhin i N. T. Kuznetsov. "Interaction of the anion [2-B<sub>10</sub>H<sub>9</sub>O(CH<sub>2</sub>)<sub>4</sub>O]− with secondary amines". Fine Chemical Technologies 17, nr 5 (20.11.2022): 427–38. http://dx.doi.org/10.32362/2410-6593-2022-17-5-427-438.

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Objectives. One of the most promising methods of treating malignant tumors is 10B-neutron capture therapy. While compounds based on cluster boron anions [BnHn]2− (n = 10, 12) are often used as boron-containing agents due to the very high specific concentration of boron atoms per particle, the use of such compounds is associated with the need to develop new methods for the functionalization of boron clusters associated with the production of boron-containing derivatives containing biologically active functional groups. One of the most convenient methods of modification of [BnHn]2− (n = 10, 12) anions is the interaction of their derivatives containing cyclic oxonium-type substituents with negatively charged or neutral nucleophilic reagents. The disclosure of substituents of this type leads to the formation of closo-borates with functional groups separated from the cluster by an alkoxyl spacer chain. The purpose of this study is to develop methods for the synthesis of derivatives of the closo-decaborate anion [B10H10]2− with pendant nitrogen-containing groups.Methods. The general control of the reactions of the disclosure of cyclic substituents was carried out on the basis of 11B nuclear magnetic resonance (NMR) spectroscopy data. The structure of the obtained derivatives, including the nature of the attached functional groups, was determined using 1H, 13C attached proton test (APT) NMR and infrared (IR) spectroscopy data. The molecular weight of the synthesized compounds was confirmed by electrospray ionization mass-spectrometry (ESI–MS).Results. The interaction of the anion [2-B10H9O(CH2)4O]− with secondary amines (dimethylamine, dipropylamine, diallylamine, dibutylamine, diisobutylamine, morpholine, di-sec-butylamine) in an ethanol environment is investigated. As a result of the reactions, a cyclic substituent is shown to expand with the addition of a nucleophilic reagent. Seven new derivatives of the closodecaborate anion with pendant nitrogen-containing groups have been synthesized.Conclusions. A developed method for obtaining closo-decaborates with ammonium groups separated from the boron cluster by an alkoxyl spacer group is presented. It is shown that the use of amines of various structures does not fundamentally affect the course of the reactions, allowing the composition and structure of the target derivatives to be effectively regulated. The resulting compounds can be involved in further modification reactions due to a reactive pendant group, as well as being suitable for use as effective polydentate ligands. Closo-decaborates with pendant nitrogen-containing groups and their derivatives are of considerable interest in the synthesis of compounds for use in 10B-neutron capture therapy of malignant tumors.
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44

Zhang, Ting, Timothy Steenhaut, Michel Devillers i Yaroslav Filinchuk. "Release of Pure H2 from Na[BH3(CH3NH)BH2(CH3NH)BH3] by Introduction of Methyl Substituents". Inorganics 11, nr 5 (7.05.2023): 202. http://dx.doi.org/10.3390/inorganics11050202.

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Over the last 10 years, hydrogen-rich compounds based on five-membered boron–nitrogen chain anions have attracted attention as potential hydrogen storage candidates. In this work, we synthesized Na[BH3(CH3NH)BH2(CH3NH)BH3] through a simple mechanochemical approach. The structure of this compound, obtained through synchrotron powder X-ray diffraction, is presented here for the first time. Its hydrogen release properties were studied by thermogravimetric analysis and mass spectrometry. It is shown here that Na[BH3(CH3NH)BH2(CH3NH)BH3], on the contrary of its parent counterpart, Na[BH3NH2BH2NH2BH3], is able to release up to 4.6 wt.% of pure hydrogen below 150 °C. These results demonstrate that the introduction of a methyl group on nitrogen atom may be a good strategy to efficiently suppress the release of commonly encountered undesired gaseous by-products during the thermal dehydrogenation of B-N-H compounds.
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45

Kliegel, Wolfgang, Ute Schumacher, Steven J. Rettig i James Trotter. "Structural studies of organoboron compounds. XLVI.1 5,5-Pentamethylene-2-phenyl-4,5-dihydrooxazol-N-oxide(N—O—B)trifluoroborane". Canadian Journal of Chemistry 69, nr 8 (1.08.1991): 1212–16. http://dx.doi.org/10.1139/v91-904.

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The reaction of N-hydroxy-N-[(1-hydroxycyclohexyl)methyl]benzamide with dimethylether-boron trifluoride gives 5,5-penta-methylene-2-phenyl-4,5-dihydrooxazol-N-oxide(N—O—B)trifluoroborane [3-(2,2,2-trifluoro-1-oxa-2-borataethyl)-5,5- pentamethylence-2-phenyl-1-oxa-3-azonia-2-cyclopentene] in high yield. Crystals of the product are monoclinic, a = 8.1147(4), b = 15.448(1), c = 11.4144(6) Å, β = 95.133(5)°, Z = 4, space group P21/c. the structure was solved by direct mothods and was refined by full-matrix least-squares procedures to R = 0.043 and Rw = 0.058 for 2178 reflections with I ≥ 3σ(I). the structure analysis confirms that the title compound has an open-chain boron-nitrogen betaine structure and, as such, is the first isolated and fully characterized open-chain non-chelate boron complex of a cycloimidate N-oxide (cyclohydroximate). Bond lengths (corrected for libration) involving the tetrahedrally coordinated boron atom are O—B = 1.530(3) and F—B = 1.370(2)–1.391(2) Å.Key words: crystal structure, organoboron compound, boron compound.
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46

Aspinall, Garreth M., May C. Copsey, John C. Jeffery, Angela P. Breakspear (neé Leedham), Christopher A. Russell i John M. Slattery. "Lithium–nitrogen and lithium–boron–nitrogencage compounds formed using the phenylhydrazido backbone". Dalton Trans., nr 9 (2006): 1234–38. http://dx.doi.org/10.1039/b510103d.

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47

Gapurenko, O. A., R. M. Minyaev i V. I. Minkin. "Theoretical design of new sandwich compounds of boron, carbon, nitrogen, and oxygen". Russian Journal of General Chemistry 79, nr 4 (kwiecień 2009): 728–39. http://dx.doi.org/10.1134/s1070363209040094.

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48

Gribanova, Tatyana N., Ruslan M. Minyaev i Vladimir I. Minkin. "Planar tetracoordinated nitrogen in boron-containing compounds: a theoretical quantum-chemical study". Mendeleev Communications 12, nr 5 (styczeń 2002): 170–72. http://dx.doi.org/10.1070/mc2002v012n05abeh001655.

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Bielawski, J., i K. Niedenzu. "Boron-nitrogen compounds. 108. Triply bridged diboron species of the pyrazabole type". Inorganic Chemistry 25, nr 1 (styczeń 1986): 85–87. http://dx.doi.org/10.1021/ic00221a022.

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50

Zhang, Jianguo, Qian Shu Li i Shaowen Zhang. "Theoretical study on the structures of boron–nitrogen alternant open chain compounds". Journal of Molecular Structure: THEOCHEM 715, nr 1-3 (luty 2005): 133–41. http://dx.doi.org/10.1016/j.theochem.2004.09.062.

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