Journal of Chemical Sciences | |
Catecholato complexes of cobalt and nickel with 1,4-disubstituted-1,4-diazabutadiens-1,3 and 1,2-bis(diphenylphosphino)ethane | |
Michael P Bubnov1 21  Anna V Cherkasova1  Nikolay O Druzhkov1  Irina A Teplova1  Georgy K Fukin11  Vladimir K Cherkasov11  | |
[1] G A Razuvaev Institute of Organometallic Chemistry of RAS, 603950 Tropinina str. 49, GSP-445, Nizhny Novgorod, Russia$$ | |
关键词: Catecholates; diazabutadienes; cobalt; nickel; ligand exchange; oxidation; structural study.; | |
DOI : | |
来源: Indian Academy of Sciences | |
【 摘 要 】
Divalent cobalt and nickel form four-coordinate complexes with sterically hindered 3,6-di-tert-butylcatecholato dianion (3,6-DBCat) and neutral bidentate 1,4-disubstituted-1,4-diazabutadiens-1,3 (DAB). Structural study of (1,4-di-tert-butyl-1,4-diazabutadiene-1,3)(3,6-di-tert-butyl-catecolato)nickel and (1,4-bis-(2,6-di-iso-propylphenyl)-2,3-dimethyl-1,4-diazabutadiene-1,3)(3,6-di-tert-butyl-catecolato)cobalt indicates square-planar environment of metals. Chemical one-electron oxidation of nickel complexes proceeds through catecholate ligand and leads to o-semiquinonato adducts. EPR spectral parameters indicate preservation of square-planar configuration after oxidation. Complexes (DAB)M(Cat) (M = Ni, Co) undergo neutral ligand substitution reactions.
【 授权许可】
Unknown
【 预 览 】
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