Reduction by Iron(II), Equilibrium, and Rate of Isomerization in the

ALBERTHAIM [CONTRIBVTION FROM

THE

DdPARTMENT

OF

Vol. 86

CHEMISTRY, T H E PENSSYLVANIA ST.4TE GNIVERSITY, USIVERSITY PENSYLVASIA 168021

PARK,

Reduction by Iron(I1), Equilibrium, and Rate of Isomerization in the cis-trans-Co (NH,) .I(OH,) N, +* System BY ALBERTHAIM ItECEIVED I i h R R V A R Y 8, 1964 T h e rate of Fe+*reduction of an equilibrium mixture of cis- and trans-Co( S H ~ ) , ( O H I ) N ~has + * been measured a t 25" and Z[ClO,-] = 0.50 M. Above 1.5 X -11 [Fe"?], a "fast" and a "slow" rate are observed with rate coefficients (seconds) 24[Fe-*] and 1.12 X 0.355[FeA2], respectively. At very low [Fe-?I,