Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/95291
Title: Thermal degradation of transition metal carbonyl complexes. part iii. thermogravimetric and differential scanning calorimetric studies of triphenylphosphine pentacarbonyls of chromium, molybdenum and tungsten
Authors: Andy Hor, T.S. 
Chan, H.S.O. 
Chiam, C.S.M.
Lim, K.H.
Issue Date: 15-Jun-1988
Source: Andy Hor, T.S.,Chan, H.S.O.,Chiam, C.S.M.,Lim, K.H. (1988-06-15). Thermal degradation of transition metal carbonyl complexes. part iii. thermogravimetric and differential scanning calorimetric studies of triphenylphosphine pentacarbonyls of chromium, molybdenum and tungsten. Thermochimica Acta 128 (C) : 175-184. ScholarBank@NUS Repository.
Abstract: Thermogravimetric and differential scanning calorimetric studies on M(CO)5(PPh3) (M = Cr,Mo,W) revealed a sequential decomposition process which commenced at ca. 150°C. The Cr complex breaks down with a concurrent liberation of one PPh3 and two CO ligands. The Mo complex, however, eliminates two CO ligands stepwise, followed by the cleavage of the Mo-PPh3 bond. Expulsion of the PPh3 ligand in the W complex is facile, and occurs prior to the simultaneous elimination of the five CO ligands. Complete elimination of the ligands occurs readily in the latter complex below ca. 350 °C, which is consistent with a recent microcalorimetric study in the literature. The degradation pattern is dependent on the electronic and steric factors of the metal and ligands. © 1988.
Source Title: Thermochimica Acta
URI: http://scholarbank.nus.edu.sg/handle/10635/95291
ISSN: 00406031
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