SPIN-CROSSOVER COMPLEXES IN SOLUTION .1. SUBSTITUTIONAL LABILITY OF [FE(BZIMPY)2](CLO4)2

被引：23

作者：

STRAUSS, B

LINERT, W

GUTMANN, V

JAMESON, RF

机构：

[1] VIENNA TECH UNIV, INST INORGAN CHEM, A-1060 VIENNA, AUSTRIA

[2] UNIV DUNDEE, DEPT CHEM, DUNDEE DD1 4HN, SCOTLAND

来源：

MONATSHEFTE FUR CHEMIE | 1992年 / 123卷 / 6-7期

关键词：

2,6-BIS(BENZIMIDAZOL-2'-YL)PYRIDINE; COMPLEX FORMATION; DEPROTONATION; SPIN-CROSSOVER; SUBSTITUTIONAL LABILITY; THERMOCHROMISM;

D O I：

10.1007/BF00816847

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The iron(II) complexes of the nitrogen donor ligand 2,6-bis(benzimidazol-2'-yl)pyridine (bzimpy) have been investigated in nonaqueous solvents using various spectrophotometric methods. Measurements in methanol at 20-degrees-C revealed that bzimpy can act as a bi- or tridendate ligand towards iron(II) in this solvent, forming [Fe(bziMpy)]2+ (tridendate, log K = 5.54), [Fe(bzimopy)2]2+ (bistridentate, log K = 4.12) and [Fe(bzimpy)3]2+ (tris-bidentate, log K = 3.85). The pronounced thermochromism of the compound is shown to be the result of both spin-crossover and dissociation equilibria. Furthermore, in solvents of higher donor numbers (greater-than-or-equal-to 30), partial or complete deprotonation of the complex [Fe(bzimpy)3]2+ is observed. Triethylamine added stepwise to methanolic solutions causes successive deprotonation.

引用

页码：537 / 546

页数：10

共 21 条

[1] NEW IRON(II) SPIN-CROSSOVER COMPLEXES WITH HETEROCYCLIC AMINE-DERIVED LIGANDS AND STEPS EXPERIMENTS ON PHOTOGENERATED METASTABLE HIGH-SPIN STATES [J].