| Abstract
| - The relative rate constants for the Rh(II)-mediated diazo decomposition of a series of para- or meta-substituted diazophenylacetates were measured through intermolecular competition. The kineticdata were further subjected to Hammett correlation analysis and were found to have better linearcorrelation with σ+. Reaction constants for four Rh(II) catalysts have been obtained, Rh2(OAc)4(ρ = −1.29 with σ+, r = −0.99), Rh2(Ooct)4 (ρ = −1.31 with σ+, r = −0.99), Rh2(acam)4 (ρ = −1.18with σ+, r = −0.99), Rh2(O2CCF3)4 (ρ = −1.46 with σ+, r = −0.99). The mechanistic implications ofthese data are discussed.
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