| Popis: |
The neutral tris -2,2′-bipyridine(bipy) and 1,10-phenanthroline(phen)compounds Mbipy 3 and Mphen 3 can be made conveniently in high yield by sodium amalgam reduction of the chlorides of Ti, Zr, Hf, V, Nb, Ta, Cr or better, for Mo, W and Re, the respective adducts MoCl 4 L, WCl 4 L and ReCl 4 (THF) in tetrahydrofuran containing the ligands. The Cr and Mo compounds can also be obtained from the dimeric acetates M 2 (CO 2 Me) 4 . For vanadium, similar compounds have been obtained from 2,2′-dipyridylamine, 2,2′-dipyridyldisulfide and di- t -butyldiimine. Reduction of VCl 3 in THF containing one equivalent of 2,2′-bipyridine under CO gives the carbonyl V(CO) 4 bipy. Interaction of Vbipy 3 with NO and CH 3 I give respectively, V(NO)bipy 3 and [V(CH 3 )I(bipy)]. |
