Molybdenum Tetrachloride
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- Category: Molybdenum knowledge
- Published on 09 September 2013
- Written by 陈桂兰
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Molybdenum tetrachloride is the inorganic compound with the empirical formula MoCl4. The material exists as two polymorphs, a polymeric ("α") and a hexameric ("β") structures, although neither form is soluble in any solvent without degradation. In each polymorph, the Mo center is octahedral with two terminal chloride ligands and four doubly bridging ligands.
It can be prepared from by dechlorination of molybdenum pentachloride using tetrachloroethene:
2 MoCl5 + C2Cl4 → 2 MoCl4 + C2Cl6
The acetonitrile adduct, which is a versatile intermediate, can be prepared directly from the pentachloride:
2 MoCl5 + 5 CH3CN → 2 MoCl4(CH3CN)2 + ClCH2CN +HCl
The MeCN ligands can be exchanged with other ligands:
MoCl4(CH3CN)2 + 2 THF → MoCl4(THF)2 + 2 CH3CN
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