Reactions of hexacarbonyl derivatives of group 5 metals (V, Nb, Ta) with 9,10-phenanthrenequinone

Article abstract of DOI:10.1016/0022-328X(87)80277-2

9,10-Phenanthreneqinone (PQ) derivatives of vanadium, niobim and tantalum of formula V(C14H8O2)3 and Na (M = V, Nb, Ta) have been prepared: (a) by reaction with PQ of the carbonyl derivatives V(CO) and Na (M = V, Nb, Ta) and (b) by reaction of the anhydros metal chlorides VCl3 and M2Cl10 (M = Nb, Ta) with the mono- or di-anion of PQ.Reaction of Na (M = Nb, Ta) with hydrogen chloride has given the protonated species H in good yields.Treatment of V(C14H8O2)3 or Na with sodium sand in THF gave the reduced derivatives of formula Na_n (n = 1, 2, 3) which were isolated and identified by elemental analysis and IR spectroscopy.Oxidation of the anionic species by silver ions was examined.The reduced species Na3 (M = V, Nb, Ta) react with benzyl chloride or triphenyl methylchloride in THF to give dibenzyl and hexaphenylethane. respectively.