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. Vol. 29. pp. 204–211. doi:10.1002/9780470132609.ch50. ISBN 9780470132609.
^ "The di-π-cyclopentadienyl hydrides of tantalum, molybdenum, and tungsten". Journal of the Chemical Society: 4854–9. 1961. doi:10.1039/JR9610004854. {{cite journal}}: Unknown parameter |authors= ignored (help)
^ 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

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

[2] "The di-π-cyclopentadienyl hydrides of tantalum, molybdenum, and tungsten". Journal of the Chemical Society: 4854–9. 1961. doi:10.1039/JR9610004854. {{cite journal}}: Unknown parameter |authors= ignored (help)

[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

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