STOICHIOMETRY AND KINETICS OF AQUATION OF (H2O)5CRCH2X2+ IONS (X = CL, BR, I) IN ACIDIC SOLUTIONS

被引：8

作者：

BYINGTON, JI ^{[1
]}

PETERS, RD ^{[1
]}

SPREER, LO ^{[1
]}

机构：

[1] UNIV PACIFIC,DEPT CHEM,STOCKTON,CA 95211

来源：

INORGANIC CHEMISTRY | 1979年 / 18卷 / 12期

关键词：

D O I：

10.1021/ic50202a008

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Mechanistic studies of the aquation of pentaaquo(halomethyl)chromium(III) ions (halo: chloro, bromo, iodo) have been made at 1.0 M ionic strength (NaC1O4-HC1O4) solution with hydrogen ion concentrations of 0.02-1.0 M in the absence of oxygen and light. The products of aquation of the chloro and bromo complexes are Cr(OH2)63+, halide ion, and methanol. Iodomethane is a major, if not the only, direct organic product from the aquation of (H2O)5CrCH2I2+ ion. The observed rates all follow the equation -d In [complex]/dt = k[complex] where, at 298 K, k = 5.6 A mechanism involving a carbanion-type transition state is proposed for CrCH2I2+. A mechanism for the chloro and bromo complexes is proposed which involves formation of a methanol-chromium intermediate, (H2O)5CrCH2OH2+, by eliminating HX after an SN2 attack of H2O at the carbon. © 1979, American Chemical Society. All rights reserved.

引用

页码：3324 / 3327

页数：4