Hexa(tert-butoxy)dimolybdenum(III) is a coordination complex of molybdenum(III). It is one of the homoleptic alkoxides of molybdenum. An orange, air-sensitive solid, the complex has attracted academic attention as the precursor to many organomolybdenum derivatives. It an example of a charge-neutral complex featuring a molybdenum to molybdenum triple bond (Mo≡Mo), arising from the coupling of a pair of d3 metal centers. It can be prepared by a salt metathesis reaction from the THF complex of molybdenum trichloride and lithium tert-butoxide:[1]

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3D model (JSmol)
  • Interactive image
  • InChI=1S/6C4H9O.2Mo/c6*1-4(2,3)5;;/h6*1-3H3;;/q6*-1;2*+3
  • CC(C)(C)O[Mo](#[Mo](OC(C)(C)C)(OC(C)(C)C)OC(C)(C)C)(OC(C)(C)C)OC(C)(C)C
Molar mass 630.59 g·mol−1
Appearance orange solid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
2 MoCl3(thf)3 + 6 LiOBu-t → Mo2(OBu-t)6 + 6 LiCl + 6 thf

The complex and its ditungsten (W2) analogue adopt an ethane-like geometry. The metal to metal bond distance is 222 pm in the related complex Mo2(OCH2CMe3)6.[2]

See alsoEdit


  1. ^ Broderick, Erin M.; Browne, Samuel C.; Johnson, Marc J. A. (2014). Dimolybdenum and Ditungsten Hexa(Alkoxides). Inorganic Syntheses. Vol. 36. pp. 95–102. doi:10.1002/9781118744994.ch18. ISBN 9781118744994.
  2. ^ Chisholm, Malcolm H.; Cotton, F. Albert.; Murillo, Carlos A.; Reichert, William W. (1977). "The molybdenum-molybdenum triple bond. 2. Hexakis(alkoxy)dimolybdenum compounds: Preparation, properties and structural characterization of hexakis(neopentoxy)dimolybdenum". Inorganic Chemistry. 16 (7): 1801–1808. doi:10.1021/ic50173a045.