Synthesis, characterisation and reactivity of group six alkylidynes bearing the tridentate phosphine PPh(C2H4PPh2)2 'triphos'.: Crystal structure of mer-[W(NCMe)(CC6H4Me-4){PPh(C2H4PPh2)2}(CO)][BF4]

被引：11

作者：

Jeffery, JC ^{[1
]}

Weller, AS ^{[1
]}

机构：

[1] Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1997年 / 548卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/S0022-328X(97)00412-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Reaction between [WBr(=CC6H4Me-4)(NC5H5Me-4)(2)(CO)(2)] and the tridentate, linear, phosphine PPh(CH2CH2PPh2)(2) (triphos) in refluxing toluene affords mer-[WBr(=CC6H4Me-4){PPh(C2H4PPh2)(2)}(CO)] 1. Halide abstraction (with TIBF4) in CH2Cl2 solvent results in carbonyl scavenging to afford the cationic dicarbonyl species fac-[WBr(=CC6H4Me-4){PPh(C2H4PPh2)(2)}(CO)(2)][BF4],2 whereas removal of the halide in acetonitrile solvent affords the complex mer-[W(NCMe)(=CC6H4Me-4)(PPh(C2H4PPh2)(2))(CO)][BF4] 3. Protonation of 1 (with HBF4.OEt2) results in the formation of the alkylidene complex mer-[WBr{=C(H)C6H4Me-4}{PPh(C-2 H4PPh2)(2)}(CO)][BF4] 4. Methylation of 1 affords the methyl/alkylidyne complex mer-[WCH3{=CC6H4Me-4}{PPh(C2H4PPh2)(2)}(CO)], 5, which can be protonated to form [WCH3{=C(H)C6H4Me-4}{PPh(C2H4PPh2)(2)}(CO)][BF4] 6. The new complexes have been fully characterised by multinuclear NMR spectroscopy and, additionally, for 3 by a single crystal X-ray diffraction study. (C) 1997 Elsevier Science S.A.

引用

页码：195 / 203

页数：9

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