Synthesis and characterization of the mixed valence Cu(I)/Cu(II) 3,5-bis(trifluoromethyl)-pyrazolate complex, [Cu(II)(2)Cu(I)(F(6)dmpz)(5)]

被引：25

作者：

Ehlert, MK ^{[1
]}

Storr, A ^{[1
]}

Summers, DA ^{[1
]}

Thompson, RC ^{[1
]}

机构：

[1] UNIV BRITISH COLUMBIA,DEPT CHEM,VANCOUVER,BC V6T 1Z1,CANADA

来源：

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE | 1997年 / 75卷 / 05期

关键词：

trimetallic; copper; 3,5-bis(trifluoromethyl)pyrazolates; x-ray structure; antiferromagnetism;

D O I：

10.1139/v97-057

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The reaction of molten 3,5-bis(trifluoromethyl)pyrazole (F(6)dmpzH) with copper metal shot under an atmosphere of dioxygen yields the green trimetallic mixed valence [Cu(II)(2)Cu(I)(F(6)dmpz)(5)]. Crystals of [Cu(II)(2)Cu(I)F(6)dmpz)(5)] are triclinic, a = 9.0557(2), b = 9.6164(2), c = 11.8874(3) Angstrom, alpha = 105.406(1)degrees, beta = 112.317(1)degrees, gamma = 90.662(1)degrees, Z = 1, space group P (1) over bar. The crystal structure was solved by direct methods and was refined by full-matrix least-squares procedures to a final R value of 0.0538 for 2591 reflections with I greater than or equal to 2 sigma(I). Magnetic susceptibility studies over the range 2-300 K reveal strong antiferromagnetic exchange coupling between the two copper(II) centers. Fits of the magnetic data to the Bleaney-Bowers equation for two interacting S = 1/2 centers gives the exchange coupling constant J= -235 cm(-1).

引用

页码：491 / 498

页数：8

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