Raman and infrared spectral studies of tungsten organometallic carbyne complex at high external pressure

研究了金属钨三键多核金属有机配合物 [Cl(CO) 2 (DPPE)WCC6 H4CCC6 H4NC]2 ReCl(CO) 3(DPPE =bis(diphenylphosphino)ethane,(Ph) 2 PCH2 CH2 P(Ph) 2 )不同压力下的拉曼和红外光谱 (最高压力约 5 0kbar)。配合物在 3 0kbar存在一压力诱导二级相变。金属钨三键伸缩振动ν(WC)压力相关 (dν/dp)在低压相区 ( 0 5 9cm-1·(kbar) -1)与高压相区 ( 0 0 4cm-1·(kbar) -1)差别很大 (约 15倍 )。在高压下 ,从基团Cl(CO) 2 (DPPE)...The Raman and infrared spectra of complex: [Cl(CO)(2), (DPPE)W equivalent to CC6H4C equivalent to CC6H4NC](2)Re Cl(CO)(3), (DPPE = bis(di-phenylphosphino) ethane, (Ph)(2)PCH2CH2P(Ph)(2)) were measured at high extemal pressure (up to about 50 kbar). The pressure induced phase transition was observed near 30 kbar. The pressure dependence dv/dp of v (W equivalent to C) at the low-pressure phase is a little high (0.59 cm(-1 .)(kbar)(-1)) and is very low (0.04 cm(-1.)(kbar)(-1)) at the high-pressure phase. It shows that the pi -backbonding from W to pi* -orbital of CO is strengthened at the high external pressure in fragment Cl(CO)(2) (DPPE) W equivalent to C; The bond intensity and the force constant of W equivalent to C and v(W equivalent to C) are decreasing;This effect compete with the normal increasing v(W equivalent to C) on compression.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000171963200006&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701SCI(E)EIPubMed中文核心期刊要目总览(PKU)中国科学引文数据库(CSCD)205596-5982