HYDROGEN-BONDING IN HEXAMMINEMETAL(II) BROMIDES [M(NH3)6]BR-2 (M(2+)=CA2+, MN2+, FE2+, CO2+, NI2+, CU2+, CD2+) - SYNERGETIC EFFECT OF M(2+)

被引：17

作者：

ESSMANN, R

机构：

[1] FB 8/ Anorganische Chemie, Universität-GH Siegen, Siegen

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1995年 / 351卷

关键词：

D O I：

10.1016/0022-2860(95)08850-U

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

IR spectra of isotypic hexamminemetal(II) bromide salts [M(NH3)(6)]Br-2 (K2PtCl6-type structure for M(2+) = Ca2+ Mn2+, Fe2+, Co2+, Ni2+, Cd2+; tetragonal structure related to the K2PtCl6-type structure for M(2+) = CU2+) and of isotopically dilute samples (5% deuterated) have been recorded in the range 400-4000 cm(-1) with regard to the influence of M(2+) on the strength of N-H ... X(-) hydrogen bonds. This so-called synergetic effect does not correlate simply with either the ionic radii or electron configuration of M(2+), but must be caused by a superposition of electronic and ionic radii effects. Arranging the metal ions with decreasing strength of their synergetic effect leads to the;following series: CU2+ (m)uch greater than CO2+ > Mn2+ > Fe2+ > Ni2+ = Cd2+ > Ca2+.

引用

页码：91 / 94

页数：4

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