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Solid‐state infrared and Raman spectra of carbonyl‐ tert ‐butyl isocyanide complexes of chromium(0), molybdenum(0) and tungsten(0), M(CO) 6− n (CNBu‐ t ) n ( n = 1–3)
Author(s) -
Li Hongqi,
Butler Ian S.,
Uhm Haewon L.
Publication year - 1992
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250230806
Subject(s) - raman spectroscopy , metal carbonyl , chemistry , isocyanide , molybdenum , tungsten , chromium , ligand (biochemistry) , infrared spectroscopy , infrared , crystallography , metal , solid state , photochemistry , inorganic chemistry , analytical chemistry (journal) , stereochemistry , organic chemistry , biochemistry , physics , receptor , optics
Vibrational assignments are reported for the room‐temperature IR and Raman spectra of three series of solid group 6B metal(0) carbonyl‐ tert ‐butyl isocyanide complexes of the general formula M(CO) 6‐ n (CNBu‐ t ) n , where M = Cr, Mo, W and n = 1–3. Sequential replacement of the CO groups by CNBu‐ t leads to gradual shifts of the ν(CN) bands to higher energies, while the ν(CO) bands shift to lower energies. These results provide good evidence for the stronger σ‐donor and weaker π‐acceptor capacities of the CNBu‐ t ligand compared with those of CO.