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- W2045683162 abstract "The competition kinetics between metal complexes and (*)NO for aliphatic radicals is a convenient technique for determining the rate constants of the reactions of (*)NO with aliphatic radicals. Thus, the rate constants of (*)CH(3) and (*)CH(2)OH with (*)NO were determined to be (3.4 +/- 1.1) x 10(9) and (5.9 +/- 0.5) x 10(9) M(-)(1) s(-)(1), respectively. The same rate constants can be determined, in several systems, from the decrease in the half-life of transient complexes with metal-carbon sigma-bonds which decompose homolytically. In the presence of (*)NO, the half-life of these transient complexes decreases, and their decomposition turns from second-order to first-order processes. From the dependence of the observed first-order rate constant on (*)NO and on the metal complex concentrations, it is concluded that the mechanism of the decomposition of these transients in the presence of (*)NO involves the reaction of (*)NO with the carbon-centered radicals as well as with the transient with the metal-carbon sigma-bonds to form the same products. The rate constants of the reactions of (*)NO with (cyclam)(H(2)O)Ni(III)CH(3)(2+) and (nta)Co(III)CH(2)OH(H(2)O)(-) were determined to be (1.5 +/- 0.2) x 10(5) and (3.6 +/- 0.4) x 10(8) M(-)(1) s(-)(1), respectively. The reactions of (*)NO with complexes with metal-carbon sigma-bonds are analogous to those of aliphatic radicals and dioxygen with the same complexes. This is not surprising as (*)NO is a radical. The biological implications of these results are discussed." @default.
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- W2045683162 date "1997-06-01" @default.
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- W2045683162 title "Mechanisms of Reactions of <sup>•</sup>NO with Complexes with Metal−Carbon σ-Bonds and with Aliphatic Radicals" @default.
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- W2045683162 doi "https://doi.org/10.1021/ic9614327" @default.
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