Complexation of TiF4 with PhP(O)[CH2C(O)NMe2]2 in CH2Cl2: Appearance of a Chiral Center at Chelate Coordination

Autor:	E. E. Nifant’ev, Vladimir Kovalev, E. G. Il’in
Rok vydání:	2018
Předmět:	010405 organic chemistry Chemistry Ligand Fluorine-19 NMR 010402 general chemistry Ring (chemistry) 01 natural sciences 0104 chemical sciences Ion Crystallography Transition metal Octahedron Chelation Physical and Theoretical Chemistry Conformational isomerism
Zdroj:	Doklady Physical Chemistry. 479:52-56
ISSN:	1608-3121 0012-5016
DOI:	10.1134/s0012501618030028
Popis:	The reaction of TiF4 with PhP(O)[CH2C(O)NMe2]2 in CH2Cl2 has been studied by 19F NMR spectroscopy. It has been found that the major reaction products are chelate tetrafluoro complex (η2-L)TiF4 where the ligand is coordinated to the titanium ion through the P=O and C=O groups and cis-TiF4(ОР···L)2 where both ligands are coordinated to the central ion through the more basic P=O groups. Spectral features of the tetrafluoro chelate have been studied, which have been attributed for the first time to the appearance of a chiral center at chelate coordination. The character of manifestation of conformational isomerism of the chelate ring and chiral center in the chelating ligand in mixed octahedral complexes of d0 transition metal fluorides in 19F NMR spectra is discussed.
Databáze:	OpenAIRE
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