title: [Raman and infrared spectral studies of tungsten organometallic carbyne complex at high external pressure].
abstract: The Raman and infrared spectra of complex: [Cl(CO)2 (DPPE) W identical to CC6H4C identical to CC6H4NC]2 Re Cl(CO)3 (DPPE = bis (diphenylphosphino) ethane, (Ph)2PCH2CH2P(Ph)2) were measured at high external pressure (up to about 50 kbar). The pressure induced phase transition was observed near 30 kbar. The pressure dependence d nu/dp of nu (W identical 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 identical to C; The bond intensity and the force constant of W identical to C and nu (W identical to C) are decreasing; This effect compete with the normal increasing nu (W identical to C) on compression.
authors.affiliation: State Key Laboratory of Rare Earth Material Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors.forename: Z H
authors.initials: ZH
authors.lastname: Xu
authors.forename: A
authors.initials: A
authors.lastname: Mayr
authors.forename: I S
authors.initials: IS
authors.lastname: Butler
mesh_terms: D002219:Carbamates / Q000737:chemistry*; D002614:Chelating Agents / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry*; D011312:Pressure; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman; D014414:Tungsten / Q000737:chemistry*
chemical_list: D002219:Carbamates; D002614:Chelating Agents; D009942:Organometallic Compounds; C004359:barban; D014414:Tungsten