Molybdocene dihydride is the organomolybdenum compound with the formula (η5-C5H5)2MoH2. Commonly abbreviated as Cp2MoH2, it is a yellow air-sensitive solid that dissolves in some organic solvents.
The compound is prepared by combining molybdenum pentachloride, sodium cyclopentadienide, and sodium borohydride. The dihydride converts to molybdocene dichloride upon treatment with chloroform.
The compound adopts a "clamshell" structure where the Cp rings are not parallel.K. Prout, T. S. Cameron, R. A. Forder, and in parts S. R. Critchley, B. Denton and G. V. Rees "The crystal and molecular structures of bent bis-πcyclopentadienyl-metal complexes: (a) bis-πcyclopentadienyldibromorhenium(V) tetrafluoroborate, (b) bis-πcyclopentadienyldichloromolybdenum(IV), (c) bis-πcyclopentadienylhydroxomethylaminomolybdenum(IV) hexafluorophosphate, (d) bis-πcyclopentadienylethylchloromolybdenum(IV), (e) bis-πcyclopentadienyldichloroniobium(IV), (f) bis-πcyclopentadienyldichloromolybdenum(V) tetrafluoroborate, (g) μoxo-bis[bis-πcyclopentadienylchloroniobium(IV)] tetrafluoroborate, (h) bis-πcyclopentadienyldichlorozirconium" Acta Crystallogr. 1974, volume B30, pp. 2290–2304.
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