The microwave spectrum and MnH bond length for HMn(CO)5
✍ Scribed by Stephen G Kukolich; Shane M. Sickafoose
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 360 KB
- Volume
- 215
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The microwave rotational spectrum for the symmetric top, manganese pentacarbonylhydride, was measured in the 5-l 1 GHz range using a pulsed-beam, Fourier transform microwave spectrometer. For HMn(CO), we obtained A=E=907.9841( ) MHz andeqQ(Mn)=-44.22(2)MHz.ForDMn(CO)~,A=B=902.7682(3) MHzandeqQ(Mn)=-45.24(4) MHz.OnlyK=Oand K= 4 transitions were observed, confirming the expected C," symmetry. With other structural parameters constrained to previously reported values, rO ( Mn-H ) = 1.64 ( 4) A. The C,-Mn-C, angle derived from the data is approximately 97 ', if Mn-C-O angles are constrained to 180".
📜 SIMILAR VOLUMES
Ab initio SCF MO calculations of the electronic structure of Mn(CO)sH and Mn(CO)sCH 3 predict small (< 0.4 eV) splitting between the metal e and b2 orbitals and lead to a new interpretation of their photoelectron spectra which does not necessitate invoking 7r back-bonding to the -CH 3 group in the c
st oxidative addition reactions to alkane C-H bonds. In contrast, a lighter transition-metal Ž . center i.e., the second row will result in a larger ⌬ E and then tend to undergo the st reductive elimination reactions of the C-H bond-forming. The results obtained are in good agreement with the availa