DIBROMOALKYNE COMPLEXES OF TUNGSTEN(II)

被引：16

作者：

BAKER, PK ^{[1
]}

MULDOON, DJ ^{[1
]}

LAVERY, AJ ^{[1
]}

SHAWCROSS, A ^{[1
]}

机构：

[1] ZENECA SPECIAL,MANCHESTER M9 3DA,LANCS,ENGLAND

来源：

POLYHEDRON | 1994年 / 13卷 / 20期

关键词：

D O I：

10.1016/S0277-5387(00)86625-5

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Treatment of [WBr2(CO)(3)(NCMe)(2)] with an excess of MeC(2)Me or two equivalents of RC(2)R (R = Ph or CH2Cl) in CH2Cl2 at room temperature gave the bis(alkyne) complexes [WBr2(CO)(NCMe)(eta(2)-RC(2)R)(2)]. Two equivalents of PPh(2)Cy reacts with [WBr2(CO)(NCMe)(eta(2)-MeC(2)Me)(2)] to afford the bis(phosphine complex [WBr2(CO)(PPh(2)Cy)(2)(eta(2)-MeC(2)Me)]. Equimolar quantities of [WBr2(CO)(NCMe)(eta(2)-MeC(2)Me)(2)] and L Lambda L [L Lambda L = Ph(2)P(CH2)(n)PPh(2) (n = 1-6) or 2,2'-bipy] react in CH2Cl2 at room temperature to give either [WBr2(CO){Ph(2)P(CH2)(n)PPh(2)}(eta(2)-MeC(2)Me)] or [WBr(CO)(2,2'bipy) (eta(2)-MeC(2)Me)2]Br, respectively. The cationic nature of [WBr(CO)(2,2'-bipy)(eta(2)-MeC(2)Me)(2)]Br was confirmed by reaction with Na[BPh(4)] in acetonitrile to give [WBr(CO)2,2'-bipy)(eta(2)-MeC(2)Me)(2)][BPh(4)]. The barrier to but-2-yne rotation of selected mono(but-2-yne) complexes was determined by using variable temperature H-1 NMR spectroscopy. C-13 NMR spectroscopy was used to suggest the number of electrons donated to the metal for selected complexes.

引用

页码：2915 / 2921

页数：7

共 29 条

[1] REACTIONS OF COORDINATED LIGANDS .24. THE REACTION OF BIS(BUT-2-YNE)CARBONYL(ETA-CYCLOPENTADIENYL OR ETA-5-INDENYL)MOLYBDENUM TETRAFLUOROBORATE WITH ACETONITRILE AND PHOSPHINES - CRYSTAL-STRUCTURES OF BUT-2-YNECARBONYL(ETA-5-INDENYL)(TRIETHYLPHOSPHINE)MOLYBDENUM TETRAFLUOROBORATE AND BUT-2-YNE(ETA-5-INDENYL)BIS(TRIMETHYLPHOSPHINE)MOLYBDENUM TETRAFLUOROBORATERU [J].