A study of the Reactions of tetrabromopctacarbonyldimolybdenum(II) Complex with 1 ,2-bis(diphcnylphosphino)ethane at Elevated Temperature
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Date
1998
Authors
Changamu, Evans O.
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Abstract
The reaction between (Mo(CO)4Br2)2,and 1,2-bis( diphenylphosphino )ethane, (dppe), has been investigated. The results show that at the refluxing temperature of tetralin (about 190 C)
(Mo( CO)4Br2h reacts with 1,2-bis( diphenylphosphino )ethane
(dppe ),giving disproportionation and decarbonylation products. The
decarbonylation products isolated from the reaction mixture wtre a maroon
coloured complex of empirical formula Mo( dppe )Br2 and a yellow
coloured complex of empirical formula Mo( dppe hBr2. The
disproportionation products isolated were a brown coloured Mo(IV)
complex, Mo(dppehBq, a yellow coloured Mo(O) complex,
Mo(COh(dppeh and a pale flesh complex whose elemental analysis data
suggest is Mo(dppe)).CloH12. The UV-VIS and IR spectra of the various
complexes isolated have been recorded. The UV-VIS spectroscopy was
used to distinguish between the maroon-coloured complex with empircal
formula MoBr2(dppe) and the yellow complex MoBr2(dppeh. Electrical
conductivity measurements have been done on MoBq( dppe h in
nitrobenzene and the results show that it is a 1:1 electrolyte. The possible
reaction mechanisms by which these products were formed are suggested.
Description
Department of Chemistry, 97p. 1998