Title: Kinetics of CO Addition to Ni(cyclam)<sup>+</sup> in Aqueous Solution
Abstract:The addition of CO to Ni(cyclam)+ in homogeneous aqueous solution has been studied by pulse radiolysis and laser flash photolysis. The reaction was found to proceed by a sequential, two-step mechanism...The addition of CO to Ni(cyclam)+ in homogeneous aqueous solution has been studied by pulse radiolysis and laser flash photolysis. The reaction was found to proceed by a sequential, two-step mechanism. The CO addition rate constant was found to be (2.0 ± 0.2) × 109 M-1 s-1 at ambient temperature. Addition is followed by a slower, first-order reaction with a rate constant of 1.8 ± 0.2 s-1 at ambient temperature. A variable temperature study of the latter reaction yielded ΔH⧧ = 12.7 ± 0.1 kcal mol-1 and ΔS⧧ = −14.4 ± 0.1 cal K-1 mol-1. The mechanism of the reaction sequence and the possibility that the slow, first-order process represents an isomerization of the macrocyclic ligand are discussed.Read More
Publication Year: 1996
Publication Date: 1996-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 25
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