Molybdocene dihydride

Molybdocene dihydride
Names
	Other names dihydridobis(cyclopentadienyl)molybdenum(IV)
Identifiers
CAS Number	1291-40-3;
3D model (JSmol)	Interactive image;
PubChem CID	11984635;
	InChI InChI=1S/2C5H5.Mo.2H/c21-2-4-5-3-1;;;/h21-5H;;;/q-5;-1;;; Key: QCRPIEJRQZHDSX-UHFFFAOYSA-N;
	SMILES [cH-]1cccc1.[cH-]1cccc1.[H][Mo][H];
Properties
Chemical formula	C10H12Mo
Molar mass	228.16 g·mol−1
Appearance	yellow-brown powder
Melting point	163–165 °C (325–329 °F; 436–438 K)
Solubility in water	insoluble
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

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.[1][2] The dihydride converts to molybdocene dichloride upon treatment with chloroform:

The compound adopts a "clamshell" structure where the Cp rings are not parallel.[3]

References

Silavwe, Ned D.; Castellani, Michael P.; Tyler, David R. (1992). "Bis(η5-Cyclopentadienyl)Molybdenum(IV) Complexes". Inorganic Syntheses. Inorganic Syntheses. 29. pp. 204–211. doi:10.1002/9780470132609.ch50. ISBN 9780470132609.
Green, M. L. H.; McCleverty, J. A.; Pratt, L.; Wilkinson, G. (1961). "The di-π-cyclopentadienyl hydrides of tantalum, molybdenum, and tungsten". Journal of the Chemical Society: 4854–9. doi:10.1039/JR9610004854.CS1 maint: uses authors parameter (link)
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-π-cyclopentadienyl-metal complexes: (a) bis-π-cyclopentadienyldibromorhenium(V) tetrafluoroborate, (b) bis-π-cyclopentadienyldichloromolybdenum(IV), (c) bis-π-cyclopentadienylhydroxomethylaminomolybdenum(IV) hexafluorophosphate, (d) bis-π-cyclopentadienylethylchloromolybdenum(IV), (e) bis-π-cyclopentadienyldichloroniobium(IV), (f) bis-π-cyclopentadienyldichloromolybdenum(V) tetrafluoroborate, (g) μ-oxo-bis[bis-π-cyclopentadienylchloroniobium(IV)] tetrafluoroborate, (h) bis-π-cyclopentadienyldichlorozirconium" Acta Crystallogr. 1974, volume B30, pp. 2290–2304. doi:10.1107/S0567740874007011

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[1] Silavwe, Ned D.; Castellani, Michael P.; Tyler, David R. (1992). "Bis(η5-Cyclopentadienyl)Molybdenum(IV) Complexes". Inorganic Syntheses. Inorganic Syntheses. 29. pp. 204–211. doi:10.1002/9780470132609.ch50. ISBN 9780470132609.

[2] Green, M. L. H.; McCleverty, J. A.; Pratt, L.; Wilkinson, G. (1961). "The di-π-cyclopentadienyl hydrides of tantalum, molybdenum, and tungsten". Journal of the Chemical Society: 4854–9. doi:10.1039/JR9610004854.CS1 maint: uses authors parameter (link)

[3] 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-π-cyclopentadienyl-metal complexes: (a) bis-π-cyclopentadienyldibromorhenium(V) tetrafluoroborate, (b) bis-π-cyclopentadienyldichloromolybdenum(IV), (c) bis-π-cyclopentadienylhydroxomethylaminomolybdenum(IV) hexafluorophosphate, (d) bis-π-cyclopentadienylethylchloromolybdenum(IV), (e) bis-π-cyclopentadienyldichloroniobium(IV), (f) bis-π-cyclopentadienyldichloromolybdenum(V) tetrafluoroborate, (g) μ-oxo-bis[bis-π-cyclopentadienylchloroniobium(IV)] tetrafluoroborate, (h) bis-π-cyclopentadienyldichlorozirconium" Acta Crystallogr. 1974, volume B30, pp. 2290–2304. doi:10.1107/S0567740874007011