N-, NO-, As-, and P-Donor Ligands

Niobium and tantalum complexes of neutral unidentate Schiff base ligands have been prepared. MCI5 (M = Nb or Ta) reacts with Sal-NR in alcohol to give 

Ugulova, N. I. Pirtskhalava, V. A. Kogan, A. S. Egorov, and O. A. Osipov, Zhur. Obshchei Khim., 

4-(o-hydroxyphenylimino)-2-pentanone or o-(salicylidenamino)phenol] have been prepared. Me3TaCl2 and salenH2 gave Me3Ta(salen). °  

4-tetrafluorocyclobutene, l,2-bis(dimethylarsino)-3,3,4,4,5,5-hexafluorocyclo-pentene, l,2-bis(dimethylarsino)-4-fluorobenzene, l,2-bis(diethylarsino)benzene or 

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