Identifiers | |
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3D model (JSmol)
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ChemSpider | |
PubChem CID
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Properties | |
C24H54O6W2 | |
Molar mass | 806.37 g·mol−1 |
Appearance | red solid |
Density | 1.651 g/cm3 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Hexa(tert-butoxy)ditungsten(III) is a coordination complex of tungsten(III). It is one of the homoleptic alkoxides of tungsten. A red, air-sensitive solid, the complex has attracted academic attention as the precursor to many organotungsten derivatives. It an example of a charge-neutral complex featuring a W≡W bond, arising from the coupling of a pair of d3 metal centers. It has attracted particular attention for its reactions with alkynes, leading to alkyne metathesis.[1]
It can be prepared by the salt metathesis reaction from the thf complex of ditungsten heptachloride:[2]
It was originally prepared by alcoholysis of the amide W2(NMe2)6.[3]
The complex and its dimolybdenum analogue adopt a staggered, ethane-like conformation. The M-M distance is 233 pm.[4] The complex is a weak Lewis acid, forming adducts with two pyridine ligands, for example.[5]