Resonance Raman and Infrared Spectra of Carbene Complexes of Iron Porphyrins Dongsheng Lu
Title:
Resonance Raman and Infrared Spectra of Carbene Complexes of Iron Porphyrins Dongsheng Lu
Author:
Paeng, Insook R. Nakamoto, Kazuo
Appeared in:
Journal of coordination chemistry
Paging:
Volume 23 (1991) nr. 1-4 pages 3-12
Year:
1991-06-01
Contents:
The resonance Raman and infrared spectra of four carbene complexes, Fe(TTP)CCl2, Fe(TPP)13CCl2, Fe(TPP)CBr2 and Fe(TMP)CCl2 were measured in the solid state. Based on normal coordinate calculations and observed isotopic shifts by CC12/13CC12 substitution, the v(Fe=C), va(CCl2) and vs(CCl2) vibrations were assigned at 1274, 878 and 437cm-1, respectively. The bromo analogue exhibits these bands at 1270,823 and 364 cm-1, respectively. All TPP complexes exhibit the spin-state sensitive band (v2) at 1569 cm-1 and the oxidation-state sensitive band (v4) at 1370cm-1, thus suggesting that the Fe atoms in these carbene complexes are low-spin Fe(IV).
Journal description