Some Pequliarities of Complex Formation of Tantalum Pentafluoride with Ph2P(O)(CH2)2C(O)NМе2: Stereochemistry of Hydrolysis Products

Abstract

The compositions and structures of the products of the reaction of TaF₅ with Ph₂P(O)(CH₂)₂C(O)NМе₂ (L) in СН₃СN and СН₂Сl₂ are studied by the ¹⁹F and ³¹Р NMR methods. As the hydrocarbon bridge between the Р=О and С=О donor groups in carbamoylphosphine oxides elongates from –СН₂– to (–СН₂–)₂, the chelation ability of the ligand is retained and the composition of the complexes formed in a solution is determined by the ratio of components. The compositions and structures of the hydrolysis products are studied. Distinctions in the coordination behavior of the considered ligand during complex formation with tantalum pentafluoride and titanium tetrafluoride are studied.