A new geometry for homoleptic organochromium compounds

被引：12

作者：

Alonso, PJ ^{[1
]}

Forniés, J ^{[1
]}

García-Monforte, MA ^{[1
]}

Martín, A ^{[1
]}

Menjón, B ^{[1
]}

机构：

[1] Univ Zaragoza, CSIC, Fac Ciencias, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

来源：

ORGANOMETALLICS | 2005年 / 24卷 / 06期

关键词：

D O I：

10.1021/om0499106

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

[NBu4](2)[Cr(C6F5)(5)] (1) has been obtained by low-temperature treatment of [CrCl3(THF)(3)] with LiC6F5. The five-coordinate anion [Cr(C6F5)(5)](2-) has been found to be square pyramidal by X-ray diffraction methods. The SPY-5 geometry is unprecedented for homoleptic organochromium compounds. EPR data for this paramagnetic S = 3/2 system (d(3) electron configuration) point to the existence of two types of Cr-III centers with very similar coordination environments. A comparison with the titanium(III) isoleptic species [Ti(C6F5)(5)](2-) allows us to conclude that the fact that [Cr(C6F5)(5)](2-) in 1 adopts a SPY-5 structure must be due to electronic reasons associated with the electron configuration of the metal center.

引用

页码：1269 / 1274

页数：6

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