Show simple item record

dc.contributor.author Oyetunji, O.A.
dc.contributor.author Paphane, B.D.
dc.contributor.author Becker, C.A.L.
dc.date.accessioned 2012-11-06T07:16:31Z
dc.date.available 2012-11-06T07:16:31Z
dc.date.issued 2006
dc.identifier.citation Oyetunji, O.A. et al. (2006) Kinetic studies on the reactions of some tetrakis(arylisocyanide)cobalt(II) complexes with pyridine in 2,2,2-trifluoroethanol, Transition Metal Chemistry, Vol. 31, No. 7, pp. 951–957 en_US
dc.identifier.issn 0340-4285 (Print)
dc.identifier.issn 1572-901X (Online)
dc.identifier.uri http://hdl.handle.net/10311/1033
dc.description.abstract The interaction of pyridine with four tetraki(arylisocyanide)cobalt(II) complexes, [Co(CNR)4(ClO4)2] R = 2,6- Me2C6H3 (A), 2,4,6-Me3C6H2 (B), 2,6-Et2C6H3 (C) and 2,6-iPr2C6H3 (D), have been studied in 2,2,2-trifluoroethanol medium. The kinetics of the reactions were investigated over the 293–318 K temperature range. The reaction profile exhibited two distinct processes, proposed to be an initial fast substitution followed by a slow reduction, for each of the reactions. The pseudo first-order rate constants for both processes increased with increasing concentration of pyridine with the reduction processes exhibiting saturation kinetics at high pyridine concentrations. Steric hindrance plays a significant role in the rates of the reactions, as the rates decrease in the order k(A) > k(B) > k(C) > k(D). The activation enthalpies, DH , increase from A to D while the activation entropies, DS , are relatively similar for the four reactions, indicating similar transition states and hence similar mechanisms. Complex B was first synthesized and characterized in this study. en_US
dc.language.iso en en_US
dc.publisher Springer, http://www.springer.com/chemistry/journal/11243 en_US
dc.subject Pyridine en_US
dc.subject Tetrakis(arylisocyanide) en_US
dc.subject Cobalt(II) complexes en_US
dc.subject Kinetics en_US
dc.title Kinetic studies on the reactions of some tetrakis(arylisocyanide)cobalt(II) complexes with pyridine in 2,2,2-trifluoroethanol en_US
dc.type Published Article en_US
dc.link http://www.springerlink.com/content/p5745j3864054567/fulltext.pdf en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search UBRISA


Advanced Search

Browse

My Account