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Journal articles on the topic 'Diazabutadienes'

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Author: Grafiati

Published: 6 September 2023

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1

Romero-Ortega, Moisés, Ignacio Medina-Mercado, Ivann Zaragoza-Galicia, and Horacio Olivo. "2-Trifluoromethyl-1,3-diazabutadienes as Useful Intermediates for the Construction of 2-Trifluoromethylpyrimidine Derivatives." Synthesis 50, no. 20 (July 16, 2018): 4133–39. http://dx.doi.org/10.1055/s-0037-1610444.

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A methodology to prepare 2-trifluoromethylpyrimidines has been developed on the basis of a cyclization reaction of 2-trifluoromethyl-1,3-diazabutadienes. These 2-trifluoromethyl-1,3-diazabutadienes were prepared by the condensation of trifluoroacetamidine and amide acetals or with chloromethaniminium salt derived from N,N-dimethylbenzamide with phosphorus oxychloride. The cycloaddition reactions of these 2-trifluoromethyl-1,3-diazabutadienes with DMAD and phenylacetyl chloride provided 2-trifluoromethylpyrimidine derivatives in regular to moderate overall yield.

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2

Romero-Ortega, Moisés, Michelle Trujillo-Lagunas, Ignacio Medina-Mercado, Ivann Zaragoza-Galicia, and Horacio Olivo. "A Synthesis of 4-Chloro-2-(trichloromethyl)pyrimidines and Their Study in Nucleophilic Substitution." Synthesis 51, no. 02 (September 11, 2018): 530–37. http://dx.doi.org/10.1055/s-0037-1610270.

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A convenient two-step, one-pot synthesis of 4-chloro-2-(trichloromethyl)pyrimidines starting from 2-(trichloromethyl)-1,3-diazabutadienes is described. These nitrogen heterocycles were prepared by a sequential acylation/intramolecular cyclization reaction between 2-(trichloromethyl)-1,3-diazabutadienes and acyl chlorides in the presence of triethylamine followed by treatment with POCl3. This is the first report for the synthesis of this type of 4-chloro-2-(trichloromethyl)pyrimidine derivatives and serves as a source for a wide variety of other substituted pyrimidines by nucleophilic substitution reactions.

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3

Sain, Bir, Satyendra P. Singh, and Jagir S. Sandhu. "Diazabutadienes in heterocyclic syntheses: reaction of 1,3-diazabutadienes with 2-oxazolin-5-ones." Tetrahedron Letters 32, no. 38 (September 1991): 5151–52. http://dx.doi.org/10.1016/s0040-4039(00)93452-x.

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4

SAIN, B., S. P. SINGH, and J. S. SANDHU. "ChemInform Abstract: Diazabutadienes in Heterocyclic Syntheses: Reaction of 1,3- Diazabutadienes with 2-Oxazolin-5-ones." ChemInform 23, no. 23 (August 22, 2010): no. http://dx.doi.org/10.1002/chin.199223188.

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5

Alvarez-Vald�s, Amparo, Mar�a Jos� Camaz�n, Jos� R. Masaguer, and Carmen Navarro-Ranninger. "Complexes of copper(II) with diazabutadienes." Transition Metal Chemistry 12, no. 1 (February 1987): 55–58. http://dx.doi.org/10.1007/bf01023133.

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6

Bhadbhade, Mohan, Guy K. B. Clentsmith, and Leslie D. Field. "Sterically Hindered Diazabutadienes (DABs): Competing Reaction Pathways with MeLi." Organometallics 29, no. 23 (December 13, 2010): 6509–17. http://dx.doi.org/10.1021/om100850p.

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7

Nandy Mazumdar, Sujit, Manoj Sharma, and Mohinder Pal Mahajan. "Diels-Alder cycloaddition reactions of 1,3-diazabutadienes with sulfene." Tetrahedron Letters 28, no. 23 (January 1987): 2641–42. http://dx.doi.org/10.1016/s0040-4039(00)96169-0.

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8

Mazumdar, Sujit Nandy, Ibrahim Ibnusaud, and Mohinder Pal Mahajan. "Diels-alder cycloaddition reactions of 1,3-diazabutadienes with ketenes." Tetrahedron Letters 27, no. 48 (January 1986): 5875–76. http://dx.doi.org/10.1016/s0040-4039(00)85351-4.

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9

Bubnov, Michael P., Vladimir K. Cherkasov, Irina A. Teplova, Nickolay O. Druzhkov, Ivan D. Grishin, Evgenii V. Baranov, Artem S. Bogomyakov, and Gleb A. Abakumov. "Novel dioxolene nickel complexes with sterically hindered diazabutadienes. Coupling of aza-ligands coordinated to nickel." Dalton Transactions 48, no. 28 (2019): 10516–25. http://dx.doi.org/10.1039/c9dt01309a.

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10

Trifonov, Alexander A., Boris G. Shestakov, Konstantin A. Lyssenko, Joulia Larionova, Georgy K. Fukin, and Anton V. Cherkasov. "Sterically Governed Redox Reactions. One-Electron Oxidation of Ytterbocenes by Diazabutadienes: Formation of Radical-Anionic Diazabutadiene vs Covalently Bonded Imino–Amido Ligand." Organometallics 30, no. 18 (September 26, 2011): 4882–89. http://dx.doi.org/10.1021/om200429h.

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11

Motz, Philip L., John P. Williams, John J. Alexander, Douglas M. Ho, John S. Ricci, and Wallace T. Miller. "Coupling of iminoacyl groups to diazabutadienes on manganese carbonyl complexes." Organometallics 8, no. 6 (June 1989): 1523–33. http://dx.doi.org/10.1021/om00108a025.

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12

Morrone, Stefania, Gayle Harrison, and Duncan W. Bruce. "Octahedral, liquid-crystalline complexes of 1,4-diazabutadienes with rhenium(I)." Advanced Materials 7, no. 7 (July 1995): 665–67. http://dx.doi.org/10.1002/adma.19950070715.

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13

Diel, Bruce N., Peter J. Deardorff, and Catherine M. Zelenski. "Synthesis of new 2,3-perfluoroalkyl- and perfluoroaryl-1,4-diazabutadienes (α-diimines)." Tetrahedron Letters 40, no. 49 (December 1999): 8523–27. http://dx.doi.org/10.1016/s0040-4039(99)01692-5.

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14

He, Jing-Yu, Hong-Xing Xin, Hong Yan, Xiu-Qing Song, and Ru-Gang Zhong. "Convenient ultrasound-mediated synthesis of 1,4-diazabutadienes under solvent-free conditions." Ultrasonics Sonochemistry 18, no. 1 (January 2011): 466–69. http://dx.doi.org/10.1016/j.ultsonch.2010.08.002.

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15

Dworczak, Renate, Walter M. F. Fabian, Claudia Reidlinger, Alice Rumpler, Jörg Schachner, and Klaus Zangger. "Nonlinear optical properties of diazabutadienes and -hexatrienes; experimental and computational aspects." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 58, no. 10 (August 2002): 2135–44. http://dx.doi.org/10.1016/s1386-1425(01)00678-3.

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16

Paparo, Albert, Stephen P. Best, K. Yuvaraj, and Cameron Jones. "Neutral, Anionic, and Paramagnetic 1,3,2-Diazaberyllacyles Derived from Reduced 1,4-Diazabutadienes." Organometallics 39, no. 23 (February 25, 2020): 4208–13. http://dx.doi.org/10.1021/acs.organomet.0c00017.

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17

Avalos, Martín, Reyes Babiano, Pedro Cintas, JoséL Jiménez, Juan C. Palacios, and Juan B. Sánchez. "A facile and expeditious entry to acyclic carbohydrate-derived 1,2-diazabutadienes." Tetrahedron: Asymmetry 6, no. 4 (April 1995): 945–56. http://dx.doi.org/10.1016/0957-4166(95)00104-w.

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18

Rojas-Sáenz, Héctor, Galdina V. Suárez-Moreno, Iris Ramos-García, Angélica M. Duarte-Hernández, Edgar Mijangos, Adrián Peña-Hueso, Rosalinda Contreras, and Angelina Flores-Parra. "1,4-Dialkyl-1,4-diazabutadienes: their reactions with aluminum and indium halides." New J. Chem. 38, no. 1 (2014): 391–405. http://dx.doi.org/10.1039/c3nj01226c.

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19

King, Arienne S., Liliya G. Nikolcheva, Christopher R. Graves, Anna Kaminski, Christopher M. Vogels, Robert HE Hudson, Robert J. Ireland, Stephen J. Duffy, and Stephen A. Westcott. "Synthesis and reactivity of palladium and platinum diimine complexes containing boronate esters." Canadian Journal of Chemistry 80, no. 9 (September 1, 2002): 1217–22. http://dx.doi.org/10.1139/v02-145.

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Condensation of α-diketones (2,3-butanedione, benzil, and acenaphthenequinone) with 3-H2NC6H4Bpin (pin = 1,2-O2C2Me4) gave the corresponding boron-containing α-diimines. The addition of these ligands to [MCl2(coe)]2 (coe = cis-cyclooctene, M = Pd or Pt) gave complexes of the type cis-MCl2(α-diimine) in moderate to high yields. The platinum complexes have been examined for their ability to bind to DNA using enzyme digest studies. These complexes were found to bind to single-stranded DNA as well as, or better than, the non-boron containing controls, and showed binding similar to that of cisplatin (cis-PtCl2(NH3)2).Key words: boronate esters, diazabutadienes, DNA-binding, platinum.

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20

Luthardt, Peter, and Ernst-Ulrich Würthwein. "[2+2]- AND [4+2] cycloaddition reactions of 1,3-diazabutadienes with diphenylketene." Tetrahedron Letters 29, no. 8 (January 1988): 921–24. http://dx.doi.org/10.1016/s0040-4039(00)82482-x.

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21

He, Jingyu, Hongxing Xin, Hong Yan, Xiuqing Song, and Rugang Zhong. "Synthesis of 1,4-Diazabutadienes (=N,N′-Ethane-1,2-diylidenebis[amines]) by Grinding." Helvetica Chimica Acta 94, no. 1 (January 2011): 159–62. http://dx.doi.org/10.1002/hlca.201000155.

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22

Albert, I. D. L., S. Ramasesha, and P. K. Das. "Properties of some low-lying electronic states in polymethineimines and poly(2,3-diazabutadienes)." Physical Review B 43, no. 9 (March 15, 1991): 7013–19. http://dx.doi.org/10.1103/physrevb.43.7013.

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23

AVALOS, M., R. BABIANO, P. CINTAS, J. L. JIMENEZ, J. C. PALACIOS, and J. B. SANCHEZ. "ChemInform Abstract: A Facile and Expeditious Entry to Acyclic Carbohydrate-Derived 1,2- Diazabutadienes." ChemInform 26, no. 36 (August 17, 2010): no. http://dx.doi.org/10.1002/chin.199536242.

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24

Rojas-Saenz, Hector, Galdina V. Suarez-Moreno, Iris Ramos-Garcia, Angelica M. Duarte-Hernandez, Edgar Mijangos, Adrian Pena-Hueso, Rosalinda Contreras, and Angelina Flores-Parra. "ChemInform Abstract: 1,4-Dialkyl-1,4-diazabutadienes: Their Reactions with Aluminum and Indium Halides." ChemInform 45, no. 20 (April 28, 2014): no. http://dx.doi.org/10.1002/chin.201420111.

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25

Diel, Bruce N., Peter J. Deardorff, and Catherine M. Zelenski. "ChemInform Abstract: Synthesis of New 2,3-Perfluoroalkyl- and Perfluoroaryl-1,4-diazabutadienes (α-Diimines)." ChemInform 31, no. 9 (June 10, 2010): no. http://dx.doi.org/10.1002/chin.200009078.

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26

Barluenga, José, Miguel Tomás, Alfredo Ballesteros, and Luis A. López. "1,4-Cycloaddition of 1,3-diazabutadienes with enamines: An efficient route to the pyrimidine ring." Tetrahedron Letters 30, no. 34 (January 1989): 4573–76. http://dx.doi.org/10.1016/s0040-4039(01)80748-6.

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27

Booth, Corwin H., Marc D. Walter, Daniel Kazhdan, Yung-Jin Hu, Wayne W. Lukens, Eric D. Bauer, Laurent Maron, Odile Eisenstein, and Richard A. Andersen. "Decamethylytterbocene Complexes of Bipyridines and Diazabutadienes: Multiconfigurational Ground States and Open-Shell Singlet Formation." Journal of the American Chemical Society 131, no. 18 (May 13, 2009): 6480–91. http://dx.doi.org/10.1021/ja809624w.

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28

He, Jingyu, Hongxing Xin, Hong Yan, Xiuqing Song, and Rugang Zhong. "ChemInform Abstract: Synthesis of 1,4-Diazabutadienes (=N,N′-Ethane-1,2-diylidenebis[amines]) by Grinding." ChemInform 42, no. 17 (March 31, 2011): no. http://dx.doi.org/10.1002/chin.201117055.

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29

Faust, Rüdiger, Bernd Göbelt, and Christian Weber. "Triisopropylsilyl Protected Hexa-1,5-diyne-3,4-dione: A Convenient Precursor to 2,3-Dialkynyl 1,4-Diazabutadienes." Synlett 1998, no. 01 (January 1998): 64–66. http://dx.doi.org/10.1055/s-1998-1559.

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30

Faust, Rüdiger, and Bernd Göbelt. "First 2,3-Dialkynyl-1,4-diazabutadienes by Pd-Catalyzed Cross-Coupling of Bis(imidoyl chlorides) and Alkynylstannanes." Tetrahedron Letters 38, no. 46 (November 1997): 8017–20. http://dx.doi.org/10.1016/s0040-4039(97)10218-0.

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31

Janich, Simon, Roland Fröhlich, Andrea Wilken, Jan von Zamory, Atsushi Wakamiya, Shigehiro Yamaguchi, and Ernst-Ulrich Würthwein. "3,4-Dihydro-3H-pyrrol-2-imines as Conformationally Restrained 1,3-Diazabutadienes: Synthesis, Structural Properties and Protonation." European Journal of Organic Chemistry 2009, no. 13 (May 2009): 2077–87. http://dx.doi.org/10.1002/ejoc.200900045.

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32

Imhof, Wolfgang, and Ernst Anders. "Regioselectivity in Iron-Catalyzed [2+2+1] Cycloadditions: A DFT Investigation of Substituent Effects in 1,4-Diazabutadienes." Chemistry - A European Journal 10, no. 22 (November 19, 2004): 5717–29. http://dx.doi.org/10.1002/chem.200400215.

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33

FAUST, R., B. GOEBELT, and C. WEBER. "ChemInform Abstract: Triisopropylsilyl Protected Hexa-1,5-diyne-3,4-dione: A Convenient Precursor to 2,3-Dialkynyl 1,4-Diazabutadienes." ChemInform 29, no. 17 (June 23, 2010): no. http://dx.doi.org/10.1002/chin.199817087.

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34

Bootz, Konrad, and Wilhelm P. Neumann. "The first synthesis of aza-germacyclopentenes: Cycloadditions of 1-aza- and 1,4-diazabutadienes with free singlet dimethyl germylene." Tetrahedron Letters 30, no. 48 (1989): 6669–72. http://dx.doi.org/10.1016/s0040-4039(00)70646-0.

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35

FAUST, R., and B. GOEBELT. "ChemInform Abstract: First 2,3-Dialkynyl-1,4-diazabutadienes by Pd-Catalyzed Cross-Coupling of Bis(imidoyl chlorides) and Alkynylstannanes." ChemInform 29, no. 7 (June 24, 2010): no. http://dx.doi.org/10.1002/chin.199807041.

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36

Singh, G. S., and K. Kopo. "ChemInform Abstract: Synthesis of 1,1,4,4-Tetraryl-1,3-diazabutadienes (II) by Oxidation of Hydrazones (I) Using Bis(acetylacetonato)copper(II)." ChemInform 33, no. 46 (May 19, 2010): no. http://dx.doi.org/10.1002/chin.200246113.

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37

Barluenga, José, Miguel Tomás, Alfredo Ballesteros, and Luis A. López. "A Simple, Regioselective Synthesis of 5,6-Dihydro-1,3,5-triazine-2,4(1H,3H)-dione Derivatives fromN-Trimethylsilyl Imines via 1,3-Diazabutadienes." Synthesis 1989, no. 03 (1989): 228–29. http://dx.doi.org/10.1055/s-1989-27212.

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38

Baker, Robert J., Robert D. Farley, Cameron Jones, Marc Kloth, and Damien M. Murphy. "The reactivity of diazabutadienes toward low oxidation state Group 13 iodides and the synthesis of a new gallium(i) carbene analogue." Journal of the Chemical Society, Dalton Transactions, no. 20 (2002): 3844. http://dx.doi.org/10.1039/b206605j.

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39

Das, Samir, Indranil Chakraborty, and Animesh Chakravorty. "Rhenium Chemistry of Diazabutadienes and Derived Iminoacetamides Spanning the Valence Domain II−VI. Synthesis, Characterization, and Metal-Promoted Regiospecific Imine Oxidation." Inorganic Chemistry 42, no. 20 (October 2003): 6545–55. http://dx.doi.org/10.1021/ic034586c.

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40

Kia, Reza, and Azadeh Kalaghchi. "Intra- and intermolecular interactions in a series of chlorido-tricarbonyl-diazabutadienerhenium(I) complexes: structural and theoretical studies." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 76, no. 3 (May 16, 2020): 417–26. http://dx.doi.org/10.1107/s2052520620004333.

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A series of new chlorido-tricarbonylrhenium(I) complexes bearing alkyl-substituted diazabutadiene (DAB) ligands, namely N,N′-bis(2,4-dimethylbenzene)-1,4-diazabutadiene (L1), N,N′-bis(2,4-dimethylbenzene)-2,3-dimethyl-1,4-diazabutadiene (L2), N,N′-bis(2,4,6-trimethylbenzene)-2,3-dimethyl-1,4-diazabutadiene (L3) and N,N′-bis(2,6-diisopropylbenzene)-1,4-diazabutadiene (L4), were synthesized and investigated. The crystal structures have been fully characterized by X-ray diffraction and spectroscopic methods. Density functional theory, natural bond orbital and non-covalent interaction index methods have been used to study the optimized geometry in the gas phase and intra- and intermolecular interactions in the complexes, respectively. The most important studied interactions in these metal carbonyl complexes are n→π*, n→σ* and π→π*. Among complexes 1–4, only 2 shows interesting intermolecular n→π* interactions due to lp(C[triple-bond]O)...π* and lp(Cl)...π* (lp = lone pair) contacts.

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41

Kia, Reza, and Azadeh Kalaghchi. "Structural, Non-Covalent Interaction, and Natural Bond Orbital Studies on Bromido-Tricarbonyl Rhenium(I) Complexes Bearing Alkyl-Substituted 1,4-Diazabutadiene (DAB) Ligands." Crystals 10, no. 4 (April 1, 2020): 267. http://dx.doi.org/10.3390/cryst10040267.

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The synthesis, characterization, structural and computational studies of Re(I) tricarbonyl bromo complexes bearing alkyl-substituted 1,4-diazabutadiene ligands, [Re(CO)3(1,4-DAB)Br], where 1,4-DAB = N,N-bis(2,4-dimethylbenzene)-1,4-diazabutadiene, 2,4-Me2DAB (1); N,N-bis(2,4-dimethylbenzene)-2,3-dimethyl-1,4-diazabutadiene, 2,4-Me2DABMe (2); N,N-bis(2,4,6-trimethylbenzene)-1,4-diazabutadiene, 2,4,6-Me3DAB (3); and N,N-bis(2,6-diisopropylbenzene)-1,4-diazabutadiene, 2,6-ipr2DAB (4) are reported. The complexes were characterized by different spectroscopic methods such as FT-IR, 1H-NMR, 13C-NMR, and elemental analyses and their solid-state structures were confirmed by X-ray diffraction. In each complex, the Re(I) centre shows a distorted octahedral shape with a facial geometry of carbonyl groups. The gas phase geometry of the complexes was identified by density functional theory. Interesting intermolecular n…π* interactions of complexes 1 and 3 were investigated by non-covalent interaction index (NCI), and natural bond orbital (NBO) analyses. The intramolecular n…σ*, σ…π*, π…σ* interactions were also studied in complexes 3 and 4.

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42

Zhao, Jie, Jianchao Yuan, Weibing Xu, Jingjing Chen, and Yanqiong Mu. "2,3-Bis{[2,3-dimethyl-6-(phenylvinyl)phenyl]imino}butane." Acta Crystallographica Section E Structure Reports Online 70, no. 2 (January 11, 2014): o130. http://dx.doi.org/10.1107/s1600536814000440.

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In the title compound, C36H36N2, a product of the condensation reaction of 2,3-dimethyl-6-phenylvinylbenzenamine and 2,3-butanedione, the complete molecule is generated by the application of an inversion centre. The central C—C bond in the 1,4-diazabutadiene fragment istrans-configured and situated about the inversion center. The dihedral angle between the ring attached to N and the 1,4-diazabutadiene plane is 78.24 (36)°, while the 1,4-diazabutadiene plane makes an angle of 30.71 (26)° with the phenyl ring.

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43

Pott, Thomas, Peter Jutzi, Beate Neumann, and Hans-Georg Stammler. "Differing Reactivities of Cp*Ga toward Diazabutadienes: Synthesis of Novel 1-Galla-2,5-diazoles and of the Known Radical Ga[But-DAB]2." Organometallics 20, no. 10 (May 2001): 1965–67. http://dx.doi.org/10.1021/om001045b.

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44

Sain, Bir, Satyendra P. Singh, and Jagir S. Sandhu. "Diazabutadienes in heterocyclic syntheses. Preparation of pyrimidin-6-ones by reaction of 4-dialkylamino-1,3-diaza-1,3-butadienes with 2-oxazolin-5-ones." Tetrahedron 48, no. 22 (January 1992): 4567–78. http://dx.doi.org/10.1016/s0040-4020(01)81230-8.

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45

Weber, Lothar, Jan Förster, Hans-Georg Stammler, and Beate Neumann. "Contribution to the Reactivity ofN,N′-Diaryl-1,4-diazabutadienes Aryl–N=CH–CH=N–Aryl (Aryl = 2,6-Dimethylphenyl; 2,4,6-Trimethylphenyl) Towards Boron Trichloride." European Journal of Inorganic Chemistry 2006, no. 24 (December 2006): 5048–56. http://dx.doi.org/10.1002/ejic.200600728.

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46

Lv, Wen-Xian, Jian Li, Yu-Lai Hu, Ying-Peng Su, and Dan-Feng Huang. "(Z)-N-[(Z)-3-(2,5-Dimethylphenylimino)butan-2-ylidene]-2,5-dimethylaniline." Acta Crystallographica Section E Structure Reports Online 70, no. 2 (January 22, 2014): o175. http://dx.doi.org/10.1107/s1600536814001020.

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The asymmetric unit of the title compound, C20H24N2, contains one half-molecule, with the single C—C bond of the 1,4-diazabutadiene fragment situated on a centre of symmetry. The benzene rings are inclined to the 1,4-diazabutadiene mean plane by 59.5 (1)°.

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47

Uhl, Werner, Jens Molter, and Bernhard Neumüller. "Synthesis of Aluminum Hydrazides by Hydroalumination of 2,3-Diazabutadienes—Formation of an Al4(N2)3 Cage Compound and an Al3(N2)3 Macrocyclic Ligand." Chemistry 7, no. 7 (April 1, 2001): 1510–15. http://dx.doi.org/10.1002/1521-3765(20010401)7:7<1510::aid-chem1510>3.0.co;2-p.

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48

SAIN, B., S. P. SINGH, and J. S. SANDHU. "ChemInform Abstract: Diazabutadienes in Heterocyclic Syntheses. Preparation of Pyrimidin-6- ones by Reaction of 4-Dialkylamino-1,3-diaza-1,3-butadienes with 2- Oxazolin-5-ones." ChemInform 23, no. 39 (August 21, 2010): no. http://dx.doi.org/10.1002/chin.199239208.

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Trifonov, Alexander A., Elena A. Fedorova, Georgy K. Fukin, Evgenii V. Baranov, Nikolai O. Druzhkov, and Mikhail N. Bochkarev. "Bridging μ-η5:η4-Coordination of an Indenyl Ligand and Reductive Coupling of Diazabutadienes in the Assembly of Di- and Tetranuclear Mixed-Valent Ytterbium Indenyldiazabutadiene Complexes." Chemistry - A European Journal 12, no. 10 (March 20, 2006): 2752–57. http://dx.doi.org/10.1002/chem.200501181.

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WEIDENBRUCH, M., A. LESCH, and K. PETERS. "ChemInform Abstract: Silicon Compounds with Strongly Intramolecular Steric Interactions. Part 44. (4 +1) Versus (4 + 2) Cycloaddition of Di-tert.-butylsilylene and Tetra-tert.-butyldisilene to 1,4-Diazabutadienes." ChemInform 22, no. 26 (August 23, 2010): no. http://dx.doi.org/10.1002/chin.199126221.

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