Molybdenum complexes tetrameric

Several nitrido complexes of W5 1 are known. WCU reacts with C1N377 to give [WNC13] whose structure is believed to be tetrameric similar to that of its molybdenum analogue.78 [WNCI3]... 

In the case of the alkoxides and phenoxides of molybdenum(III) the interaction between metal atoms becomes dominant, leading to diamagnetic compounds of stoichiometry Mo2(OR)6 or Mo4(OR )i2(R/ = the less bulky Me or Et).78 These compounds are readily sublimable, (70-90 °C/ 10-3 Torr for Mo OPr1 ) and retain either their dimeric or tetrameric nature both in solution and the gas phase, as determined by cryoscopic measurements and mass spectrometry, respectively.78 An analogous tungsten(III) complex W2(OBu )6 can be obtained, but for other alkoxides the simple homoleptic compounds cannot be isolated.79,168... 

Alcock NW, Dudek M, Grybos R, Hodorowicz E, Kanas A, Samotus A (1990) Complex-ation between molybdenum) VI) and citrate structural characterization of a tetrameric complex, K [(Mo02)403(cit)2]. bHjO. J Chem Soc Dalton Trans 1 707-711... 

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