INTRAMOLECULAR PHOSPHINE ATTACK ON A COORDINATED ALKYNE LIGAND IN CO2(CO)4(BMA)(MU-PHCCH) - CHARACTERIZATION OF THE ZWITTERIONIC HYDROCARBYL COMPLEX CO2(CO)4[MU-ETA-2-ETA-2-ETA-1-ETA-1-PHC=C(H)PPH2 CYCLO (C=C(PPH2)C(O)OC)(O)]

被引：37

作者：

YANG, KY ^{[1
]}

BOTT, SG ^{[1
]}

RICHMOND, MG ^{[1
]}

机构：

[1] UNIV N TEXAS,CTR ORGANOMET RES & EDUC,DEPT CHEM,DENTON,TX 76203

来源：

ORGANOMETALLICS | 1994年 / 13卷 / 10期

关键词：

D O I：

10.1021/om00022a007

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The chelating diphosphine complex Co2(CO)4-(bma)(mu-PhC=CH) (1) gives the zwitterionic hydrocarbylbridged compound Co2(CO)4[mu-eta2:eta2:eta1:eta1-PhC=C(H)P-Ph2C=C(PPh2)C(O)OC(O)] (3) in refluxing 1,2-dichloroethane. Binuclear 3 is formed by a regioselective attack of one of the PPh2 moieties on the terminal alkyne carbon. The hydrocarbyl complex has been isolated and characterized in solution by IR and NMR spectroscopy. The solid-state structure of Co2(CO)4[mu-eta2:eta2:eta1:eta1-PhC=C-(H)PPh2C=C(PPh2)C(O)OC(O)] has been determined by X-ray diffraction analysis, which confirms the identity of the eight-electron hydrocarbyl ligand in 3. This work represents the first example of an intramolecular phosphine addition to a coordinated alkyne to give a mu-eta2:eta1-hydrocarbyl moiety.

引用

页码：3767 / 3769

页数：3

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