Synthesis and selected reactions of pentakis ( t -octylisocyanide)cobalt(II) complexes

Autor: Olebogeng Ramotadima, Jamil Ahmad, Victoria B. Makono, Clifford A. L. Becker, Kabelo C. Baipoledi
Rok vydání: 2008
Předmět:
Zdroj: Journal of Coordination Chemistry. 61:3375-3389
ISSN: 1029-0389
0095-8972
DOI: 10.1080/00958970802054334
Popis: The ligand 1,1,3,3-tetramethylbutylisocyanide, CNCMe2CH2CMe3, i.e. t-octylisocyanide, with Co(ClO4)2 · 6H2O or Co(BF4)2 · 6H2O in ethanol, produces pentakis(alkylisocyanide)cobalt(II) complexes, [Co(CNC8H17-t)5](ClO4)2 (1) and [Co(CNC8H17-t)5](BF4)2 · 2.0H2O (2). These Co(II) complexes undergo reduction/substitution upon reaction with trialkylphosphine ligands to produce [Co(CNC8H17-t)3{P(C4H9-n)3}2]ClO4 (3), [Co(CNC8H17-t)3{P(C4H9-n)3}2]BF4 (4), and [Co(CNC8H17-t)3{P(C3H7-n)3}2]ClO4 (5). Complex 3 is oxidized with AgClO4 to produce [Co(CNC8H17-t)3{P(C4H9-n)3}2](ClO4)2 (6). Complex 1 yields [Co(CNC8H17-t)4py2](ClO4)2 (7) upon dissolving in pyridine. Reactions with triarylphosphine and triphenylarsine ligands were unsatisfactory. The chemistry of 1 and 2 is therefore more similar to that of Co(II) complexes with CNCMe3 than with CNCHMe2, other alkylisocyanides, or arylisocyanides, but shows some behavior dissimilar to any known Co(II) complexes of alkylisocyanides or arylisocyanides. Infrared and electroni...
Databáze: OpenAIRE
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