Complexes dicyclopentadienyles du niobium a chiralite centrometallee. Utilisation du chlorure de thionyle pour les transformations reciproques NvIV → NbV et NbV → NbIV
Preparation de Complexes Dicyclopentadienyliques Dissymetriques du Niobium(IV)
作者:R. Broussier、J.D. Olivier、B. Gautheron
DOI:10.1016/s0022-328x(00)82230-5
日期:1981.5
Dicyclopentadienyl derivatives of niobium(IV) containing two different cyclopentadienyl ligands have been synthesized. The products obtained are characterized by mass and EPR spectroscopy and by elemental analysis. Starting from NbCl5, unequivocal selective routes proceed via monocyclopentadienyl complexes. The possibility of selectively obtaining several (RCp)NbCl4 compounds from RC5H4SnBu3 and a heptane suspension