[en] Complexing in solution of WOF₄ with acetamide (AA), of WOGITA₄(GITA=F, Cl) and MCl₂(M=Nb, Ta), with DMFA, of MCl₅(M=Nb, Ta) with acetoxime is studied by the method of NMR of ¹H and ¹⁹F. It has been found out that at amide: WOGITA₄ ratio from 1 up to 4 or 6 adducts with one ligand molecule are formed. Interaction of MCl₅ with DMFA also leads to adduct formation with 1:1 ratio. Substitution of chlorine by oximate groups takes place during the reaction of TaCl₅ with acetoxime (LH). Complexes with TaCl₄LxLH and TaCl₃L₂xLH compositions are found in the solution. Oximates with one, two and three oximate groups NbCl₄LxLH, NbCl₃L₂xLH, NbCl₂L₃xLH are formed in the case of NbCl₅