10 Vanadium, niobium and tantalum
Abstract
The chemistry of compounds of the Group 5 metals has been the subject of exciting and significant advances in 2004. Particular highlights are (i) the synthesis of cationic and neutral four-coordinate vanadium(IV) alkylidene complexes containing short VC bonds; (ii) the formation of phosphanylphosphinidenes via an anionic, terminal phosphide of niobium; (iii) the cross metathetical reaction between