DISSOCIATION KINETICS OF [FE(PHEN)3]2+, [FE(BIPY)3]2+ AND [FE(4,4'-ME2BIPY)3]2+ IN THE PRESENCE OF CYANIDE ION IN AQUEOUS-SOLUTION AT PRESSURES UP TO 1 KILOBAR

被引：14
|
作者：
ALSHEHRI, S
BURGESS, J
HUBBARD, CD
机构：
[1] UNIV LEICESTER,DEPT CHEM,LEICESTER LE1 7RH,ENGLAND
[2] KING KHALID MIL ACAD,RIYADH 11490,SAUDI ARABIA
[3] UNIV NEW HAMPSHIRE,DEPT CHEM,DURHAM,NH 03824
来源：
TRANSITION METAL CHEMISTRY | 1993年 / 18卷 / 02期
关键词：
D O I：
10.1007/BF00139961
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Rate constants for dissociation, in aqueous solution at 25-degrees-C, of [Fe(phen)3]2+, [Fe(bipy)3]2+, and [Fe(4,4'-Me2bipy)3]2+ in the presence of cyanide, and of the last-named complex also in the presence of hydroxide, are significantly decreased by the application of pressure (up to 1 kbar). Kinetic measurements were carried out using a high pressure cell of improved design to that used in our earlier investigations. Volumes of activation, DELTAV*, are scarcely sensitive to ligand or to attacking nucleophile, being in the range of 10-12 cm3 mol-1. An explanation of these results resides in an associative mechanism, a scheme invoked for similar reactions reported previously.
引用
收藏
页码：228 / 230
页数：3
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