Studies on Kinetics of CO Substitution of M(CO)5(M=Fe,Ru,Os) in the Presence of (CH3)3NO

Chem. J. Chinese Universities ›› 1991, Vol. 12 ›› Issue (5): 689.

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Studies on Kinetics of CO Substitution of M(CO)₅(M=Fe,Ru,Os) in the Presence of (CH₃)₃NO

Shen Jian-kun¹, Gao Yi-ci¹, Shi Qi-zhen¹, Fred Basolo²

1. Department of Chemistry, Lanzhou University, Lanzhou, 730000;
2. Department of Chemistry, Northwestern University, U. S. A.

Received:1989-09-27 Online:1991-05-24 Published:1991-05-24

Abstract

Abstract: In this paper the kinetics for COsubstitution by PPh₃of M(CO)₅(M=Fe,Ru,Os) in the presence of catalytic promoter, (CH₃)₃NO is reported. The rates of reaction are first-order in concentrations of M(CO)Sand of (CH₃)₃NO but zero-order in PPh₃concentration. The reaction rates show an approximate overall four-fold increase in the order Fe < Ru < Os. This is a contrast to the roughly fourty-fold decrease in rate in the order Fe > Ru > Os for the corresponding metal carbonyl cluster, M₃(CO)₁₂.

Key words: Reaction of carbonyl substitution, Kinetics, Mechanism

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Shen Jian-kun, Gao Yi-ci, Shi Qi-zhen, Fred Basolo . Studies on Kinetics of CO Substitution of M(CO)₅(M=Fe,Ru,Os) in the Presence of (CH₃)₃NO[J]. Chem. J. Chinese Universities, 1991, 12(5): 689.

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Studies on Kinetics of CO Substitution of M(CO)₅(M=Fe,Ru,Os) in the Presence of (CH₃)₃NO

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