Vibrational spectra and structure of {open_quotes}staircase{close_quotes} carbonyl {pi}-complexes of transition metals 2. Rotational isomerism
Journal Article
·
· Russian Chemical Bulletin
OSTI ID:75661
- A.N. Nesmeyanov Institute of Organoelement Compounds, Moscow (Russian Federation)
- Institute of High Temperature Thermodynamics, Rome (Italy)
FTIR spectra have been studied for {open_quotes}staircase{close_quotes} cyclopentadienyl complexes containing two or three metal carbonyl fragments bound by the metal-carbon bond Cp(CO){sub 2}Fe-CpmMn(CO){sub 3} (1), Cp(CO){sub 2}Fe-CpmFe(CO){sub 2}CH{sub 2}Ph, Cp(CO){sub 2}Fe-Cpm(CO){sub 2}Fe-CpmMn(CO){sub 3}, Cp(CO){sub 2}Mo-Cpm(CO){sub 2}Fe-CpmMn(CO){sub 3}, Cp(CO){sub 3}W-Cpm(CO){sub 2}Fe-CpmMn(CO){sub 3}, Cp(CO){sub 2}Fe-Cpm(CO){sub 2}Fe-BmCr(CO){sub 3}, Cr(CO){sub 3}Bm-CpmFe(CO){sub 2}CH{sub 2}Ph, where Cp = {eta}{sup 5}-C{sub 5}H{sub 5}, Cpm = {eta}{sup 1}:{eta}{sup 5}-C{sub 5}H{sub 4}, Bm = {eta}{sup 1}:{eta}{sup 6}-C{sub 6}H{sub 5}. Temperature-dependent FTIR spectra were measured in n-pentane solutions over a wide temperature range and in the low-temperature solid matrices of argon and nitrogen. Rotamers, formed due to rotation about the metal-carbon {sigma}-bond, were found in solutions and matrices. A molecular mechanics calculation of 1 proved the possibility of such rotation.
- OSTI ID:
- 75661
- Journal Information:
- Russian Chemical Bulletin, Journal Name: Russian Chemical Bulletin Journal Issue: 11 Vol. 43; ISSN RCBUEY; ISSN 1066-5285
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
40 CHEMISTRY
ABSORPTION SPECTROSCOPY
CARBONYLS
CHROMIUM COMPLEXES
ELECTRONIC STRUCTURE
IRON COMPLEXES
MANGANESE COMPLEXES
MATHEMATICAL MODELS
MOLECULAR STRUCTURE
MOLYBDENUM COMPLEXES
ORGANOMETALLIC COMPOUNDS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TUNGSTEN COMPLEXES
VIBRATIONAL STATES
ABSORPTION SPECTROSCOPY
CARBONYLS
CHROMIUM COMPLEXES
ELECTRONIC STRUCTURE
IRON COMPLEXES
MANGANESE COMPLEXES
MATHEMATICAL MODELS
MOLECULAR STRUCTURE
MOLYBDENUM COMPLEXES
ORGANOMETALLIC COMPOUNDS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TUNGSTEN COMPLEXES
VIBRATIONAL STATES