Spectroscopic, Magnetic, and Electrochemical Studies of a Dimeric N-Substituted-Sulfanilamide Copper(II) Complex. X-ray and Molecular Structure of the Cu2(sulfathiazolato)4
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- 作者：Javier Casanova ; Gloria Alzuet ; Julio Latorre ; and Joaquí ; n Borrá ; s
- 刊名：Inorganic Chemistry
- 出版年：1997
- 出版时间：May 7, 1997
- 年：1997
- 卷：36
- 期：10
- 页码：2052 - 2058
- 全文大小：196K
- 年卷期：v.36,no.10(May 7, 1997)
- ISSN：1520-510X
文摘
A copper(II) complex of formulaCu2(stz)4 (stz- =sulfathiazolato) has been synthesized and characterized bysingle-crystal X-ray diffraction. The compound crystallizes in theorthorhombic system, space groupP21cn witha = 10.595(7) Å, b = 14.274(3) Å,c = 29.65(1) Å, and Z = 4. Thestructure consists of dinuclear copper(II)units which contain four sulfathiazolato ligands bridging the metalions through a nonlinear NCN group. Thecopper atoms are four-coordinated, the chromophore beingCuN4. The Cu···Cu bond distance is2.671(2) Å.Magnetic susceptibility data in the temperature range 7-300 Kshow the occurrence of intramolecularantiferromagnetic coupling with 2J = -61.5cm-1. This low exchange energy value has beenanalyzed andrationalized through extended Hückel calculations. EPRspectra at X- and Q-band frequencies show the signalscorresponding to a dinuclear entity, being the zero-field splittingparameter, D = 0.230 cm-1.