Effects of the niobium(V) center on the energetics of ligand-centered proton and hydrogen atom transfer reactions in acyl and alkoxide complexes

被引：8

作者：

Kerr, ME ^{[1
]}

Zhang, XM ^{[1
]}

Bruno, JW ^{[1
]}

机构：

[1] WESLEYAN UNIV,HALL ATWATER LABS,MIDDLETOWN,CT 06459

来源：

ORGANOMETALLICS | 1997年 / 16卷 / 15期

关键词：

D O I：

10.1021/om970224z

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Cationic niobium eta(2)-acyl (1) and alkoxide (3) compounds are relatively strong C-H acids which give stable eta(2)-ketene (2) and eta(2)-formaldehyde (4) complexes upon deprotonation. Determinations of the C-H bond dissociation enthalpies (BDEs) show that 2(.+) gains little stabilization from radical delocalization but that generation of a Nb-C sigma bond facilitates the homolytic conversion of 3 to 4(.+).

引用

页码：3249 / 3251

页数：3

共 45 条

[41] ONE-ELECTRON OXIDATION OF CYCLOPENTADIENYLCHROMIUM CARBONYL HYDRIDES - THERMODYNAMICS OF OXIDATIVE ACTIVATION OF METAL HYDROGEN-BONDS TOWARD HOMOLYTIC AND HETEROLYTIC CLEAVAGE [J].