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

共 74 条

[61] Bis(benzene)chromium. 2. Its discovery by E. O. Fischer and W. Hafner and subsequent work by the research groups of E. O. Fischer, H. H. Zeiss, F. Hein, C. Elschenbroich, and others [J].

Seyferth, D .

ORGANOMETALLICS, 2002, 21 (14) :2800-2820

[62]

Sheldrick G.M., 1996, SADABS EMPIRICAL ABS

[63]

Sheldrick G.M., 1993, PROGRAM CRYSTAL STRU

[64] PENTAFLUOROPHENYL GROUP - ELECTRONIC EFFECT AS A SUBSTITUENT [J].

SHEPPARD, WA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1970, 92 (18) :5419-&

[65] High-field EPR study and crystal and molecular structure of trans-RSSR-[CrCl2(cyclam)]nX (X = ZnCl42-, Cl- and Cl-4H2O.5HCl) [J].

Solano-Peralta, A ;

Sosa-Torres, ME ;

Flores-Alamo, M ;

El-Mkami, H ;

Smith, GM ;

Toscano, RA ;

Nakamura, T .

DALTON TRANSACTIONS, 2004, (16) :2444-2449

[66] ELECTRON DONOR-ACCEPTOR PROPERTIES OF PHOSPHORUS LIGANDS - SUBSTITUENT ADDITIVITY [J].

TOLMAN, CA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1970, 92 (10) :2953-&

[67] Electron paramagnetic resonance and UV-Vis absorption study of trans-(1,4,8,11-tetraazacyclotetradecane)chromium(III) complexes [J].

Ueki, S ;

Yamauchi, J .

INORGANICA CHIMICA ACTA, 2002, 338 :13-18

[68] 75 YEARS OF PI-COMPLEXES OF CHROMIUM(I) [J].

UHLIG, E .

ORGANOMETALLICS, 1993, 12 (12) :4751-4756

[69] CHLOROBIS(PENTAFLUOROPHENYL)THALLIUM(III) [J].

USON, R ;

LAGUNA, A .

INORGANIC SYNTHESES, 1982, 21 :71-74

[70]

USON R, 1988, ADV ORGANOMET CHEM, V28, P219

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