MST-Department of Chemistry

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Browsing MST-Department of Chemistry by Author "Changamu, Evans O."

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    A study of the Reactions of tetrabromopctacarbonyldimolybdenum(II) Complex with 1 ,2-bis(diphcnylphosphino)ethane at Elevated Temperature
    (1998) Changamu, Evans O.
    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.