Borate molybdenum complexes

Hydridotris(3,5-dimethyl-l-pyrazolyl)borate]molybdenum-(i72-acyl) complexes, such as 1, are deprotonated by butyllithium or potassium hydride to generate enolate species, such as 488.8> jjie overa]] structure of these chiral complexes is similar to that of the iron and rhenium complexes discussed earlier the hydridotris(3,5-dimethyl-l-pyrazolyl)borate ligand is iso valent to the cyclopentadienyl ligand, occupying three metal coordination sites. However, several important differences must be taken into account when a detailed examination of the stereochemical outcome of deprotonation-alkylation processes is undertaken. 

Treatment of TpMo( = CR)(CO)2 (R = C6H4Me-4) initially gives a mixture of TpMoFe( U-CR)(CO) (k = 5, 6), but the saturated molybdenum complex readily loses CO under a nitrogen atmosphere." Parallel reaction between bis(pyrazolyl) borate alkylidyne complexes and Fe2(CO)g similarly provides the 32-valence electron dimetal species BpWFe( -CR)(CO)6." These heteronuclear bimetallic complexes have a rich further chemistry, as summarised in Scheme 78. 

ELECTROCHEMICAL PROPERTIES OF MOLYBDENUM COMPLEXES CONTAINING A BULKY TRIS(PYRAZOLYL)BORATE LIGAND... 

Electrochemical Properties of Molybdenum Complexes Containing a Bulky Tris(Pyrazolyl)Borate Ligand M. Cano, J. V. Heras, C.J. Jones and J.A. McCleverty... 

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