Infrared Spectra of the CH3-CrF, CH2=WHF, and CHWH2F Molecules: Reversible Photochemical Interconver
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- 作者：Han-Gook Cho and Lester Andrews
- 刊名：Organometallics
- 出版年：2005
- 出版时间：November 7, 2005
- 年：2005
- 卷：24
- 期：23
- 页码：5678 - 5685
- 全文大小：154K
- 年卷期：v.24,no.23(November 7, 2005)
- ISSN：1520-6041
文摘
Group 6 methylmetal fluoride, methylidene, and methylidyne complexes (CH3-MF, CH2=MHF, and CH
tities/tbd1.gif">MH2F) are formed by reaction of the laser-ablated metal atoms and methylfluoride during condensation in excess argon and have been identified by matrix infraredspectroscopy. The CH3-CrF molecule is much more stable and is the only product found forCr, and all three comparable energy products are observed for Mo, but only the more stableCH2=WHF and CHtities/tbd1.gif">WH2F forms are trapped for W. The last molecules are photoreversible,owing to 
-hydrogen transfer between carbon and metal atoms. The methylidene complexesare formed on ultraviolet irradiation (240-380 nm) at the expense of the methylidynecomplexes, and the process is reversed on visible irradiation (
> 420 nm). Calculationsshow that one -H is distorted toward the metal atom, which provides evidence of strongagostic interaction in the methylidene ground state molecules.
tities/tbd1.gif">MH2F) are formed by reaction of the laser-ablated metal atoms and methylfluoride during condensation in excess argon and have been identified by matrix infraredspectroscopy. The CH3-CrF molecule is much more stable and is the only product found forCr, and all three comparable energy products are observed for Mo, but only the more stableCH2=WHF and CHtities/tbd1.gif">WH2F forms are trapped for W. The last molecules are photoreversible,owing to -hydrogen transfer between carbon and metal atoms. The methylidene complexesare formed on ultraviolet irradiation (240-380 nm) at the expense of the methylidynecomplexes, and the process is reversed on visible irradiation ( > 420 nm). Calculationsshow that one -H is distorted toward the metal atom, which provides evidence of strongagostic interaction in the methylidene ground state molecules.