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)

被引:7
|
作者
LI, HQ [1 ]
BUTLER, IS [1 ]
UHM, HWL [1 ]
机构
[1] MCGILL UNIV,DEPT CHEM,801 SHERBROOKE ST W,MONTREAL H3A 2K6,QUEBEC,CANADA
关键词
D O I
10.1002/jrs.1250230806
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
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 v(CN) bands to higher energies, while the v(CO) bands shift to lower energies. These results provide good evidence for the stronger sigma-donor and weaker pi-acceptor capacities of the CNBu-t ligand compared with those of CO.
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页码:457 / 464
页数:8
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