1H NMR properties of trinuclear transition-metal complexes [M3 □O(OOCR)6L3]+ (M = Cr, Fe, Mn; R = CH3, C2H5,CH2NH2; L = C5H5N, H2O)

被引：0

作者：

Chen, Z ^{[1
]}

Cai, SH

Ye, JL

Zhang, LN

Lu, GT

机构：

[1] Xiamen Univ, Dept Chem, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Dept Phys, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China

[3] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fujian 350002, Peoples R China

来源：

CHINESE JOURNAL OF STRUCTURAL CHEMISTRY | 1999年 / 18卷 / 03期

关键词：

oxo-centered complexes; trinuclear complexes; NMR; chemical shifts; magnetic properties;

D O I：

暂无

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of oxo-centered trinuclear transition-metal complexes with general formula [(M3O)-O-II(OOCR)(6)L-3](+) (M = Cr, Fe, Mn; R = CH3, C2H5, CH2NH2; L = C5H5N, H2O) were studied by H-1 NMR spectra. The investigation was focussed on the change of H-1 chemical shifts with various factors such as metals, ligands, temperatures and solvents. The experimental results show that the main effect on chemical shifts comes from skeleton metals and there is antiferromagnetic exchange interaction among the three metal ions within M3O core, For manganese complexes, the influence mechanisms of paramagnetic centers on chemical shifts and peak widths were discussed. It shows that their H-1 NMR isotropic shifts are mostly contributed by contact interactions.

引用

页码：227 / 231

页数：5

共 16 条

[1] STRUCTURE AND MIXED-VALENCE STATES OF THE TRINUCLEAR IRON(II,III,III) PIVALATE COMPLEX-PIVALIC ACID ADDUCT, [FE3O(O(2)CCME(3))(6)(ME(3)CCO(2)H)(3)](ME=-CH3) [J].