Coordination adducts of niobium(V) and tantalum(V) azide M(N₃)₅ (M=Nb, Ta) with nitrogen donor ligands and their self-ionization.
Several new donor-acceptor adducts of niobium and tantalum pentaazide with N-donor ligands have been prepared from the pentafluorides by fluoride-azide exchange with Me3SiN3 in the presence of the corresponding donor ligand. With 2,2'-bipyridine and 1,10-phenanthroline, the self-ionization products [MF4(2,2'-bipy)2](+)[M(N3)6](-), [M(N3)4(2,2'-bipy)2](+)[M(N3)6](-) and [M(N3)4(1,10-phen)2](+)[M(N3)6](-) were obtained. With the donor ligands 3,3'-bipyridine and 4,4'-bipyridine the neutral pentaazide adducts (M(N3)5)2⋅L (M=Nb, Ta; L=3,3'-bipy, 4,4'-bipy) were formed.
Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089-1661 (USA). haiges@usc.edu.
Ralf
R
Haiges
Piyush
P
Deokar
Karl O
KO
Christe
adducts; azides; niobium; self-ionization; tantalum