کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1328637 977609 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
TR-FTIR absorption spectroscopy of transition metal carbonyl radicals generated by photodissociation of metal–metal bonds, by halogen abstraction or by radical ligand substitution
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
TR-FTIR absorption spectroscopy of transition metal carbonyl radicals generated by photodissociation of metal–metal bonds, by halogen abstraction or by radical ligand substitution
چکیده انگلیسی

Three methods of obtaining time-resolved Fourier-Transform infrared (TR-FTIR) absorption spectra of transition metal carbonyl radicals in hexane are reported here. For the first method, CpM(CO)2L and Cp*M(CO)2L (M = Mo, W; L = CO, PR3) radicals have been generated by photodissociation of the corresponding metal–metal bonded dimers. Radicals of formula M(CO)4L (M = Mn, Re; L = CO, PR3, AsPh3, SbPh3) and CpM(CO)n (M = Fe, Mo; n = 2, 3) have been produced via the second method which is halogen abstraction of the transition metal carbonyl halides using CpMo(CO)3 radical. For the third method, fast radical ligand substitution kinetics has been exploited to generate CpMo(CO)2PR3 radicals from CpMo(CO)3 in the presence of free phosphines. An assessment of the three methods with respect to TR-FTIR spectroscopic detection of radicals was also discussed.

Time-resolved FTIR studies of reversible and irreversible processes involving transition metal carbonyl radicals.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 690, Issue 18, 15 September 2005, Pages 4132–4138
نویسندگان
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