Synthesis and characterization of chromium and molybdenum(0) complexes bearing the (pentafluoroethyl)diphenylphosphine (pfepp) ligand

被引:17
|
作者
Palcic, JD
Baughman, RG
Golynskiy, MV
Frawley, SB
Peters, RG [1 ]
机构
[1] Memphis State Univ, Dept Chem, Memphis, TN 38152 USA
[2] Truman State Univ, Div Sci, Kirksville, MO 63501 USA
[3] Keene State Coll, Div Sci, Keene, NH 03435 USA
关键词
chromium; molybdenum; pfepp; fluoroalkylphosphine; X-ray structure; IR;
D O I
10.1016/j.jorganchem.2004.09.034
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The synthesis and characterization of two Group V1 pentacarbonyl complexes (pfepp)M(CO)(5) (M = Cr 1, Mo 2; pfepp = PPh2C2F5) are reported. Thermolysis of M(CO)(6) and pfepp in refluxing octane afforded 1 and 2 in moderate yields. These complexes were completely characterized by multinuclear NMR, IR and elemental analysis. X-ray structures for these complexes indicated they were isostructural, crystalizing in triclinic unit cells with four molecules per asymmetric unit. A comparison of the bond lengths in 1 and 2 to other (L)M(CO)(5) complexes showed a relationship between the M-C., bond length and the electronic influence of the phosphine ligand, and establishes the pfepp ligand as neither electron-rich nor electron-poor. A comparison of IR data with other (L)M(CO)(5) complexes also indicates the pfepp ligand is electronically neutral, with an electronic influence that approximates phosphites. (C) 2004 Published by Elsevier B.V.
引用
收藏
页码:534 / 538
页数:5
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