Accession Number : AD0731814

Title :   A Fluorine-19 NMR Study of Some Bromofluorotitanate Complexes and Hydrolysis of Some Titanium Tetrafluoride Complexes.

Descriptive Note : Final technical rept. Jan 70-Mar 71,

Corporate Author : WITTENBERG UNIV SPRINGFIELD OHIO DEPT OF CHEMISTRY

Personal Author(s) : Borden,Robert S.

Report Date : JUL 1971

Pagination or Media Count : 40

Abstract : Low temperature fluorine-19 nuclear magnetic resonance (NMR) spectroscopy has been used to examine a number of fluorotitanate complexes of the type TiF(x)Br(4-x):2THF (THF = tetrahydrofuran) and TiF(x)Br(4-x):DME (DME = 1,2-dimethoxyethane) where x is 1 to 4. Hydrolysis studies have also been carried out on the TiF4:2THF complex in excess THF and on TiF4:2EtOH in excess EtOH (EtOH = ethanol). Attempts were also made to study similar fluorotitanate complexes containing tetrahydrothiophene in place of THF and iodide in place of bromide. The complexes examined were found to contain octahedrally coordinated titanium and in some cases more than one geometric form was observed. DME acts as a bidentate chelating agent and coordinates through its oxygen atoms to titanium with a cis orientation. Fluorine-19 chemical shift values and coupling constants were determined for each complex. The stereochemistry was also determined for each complex where possible. A hypothetical model which considers the extent of ligand to titanium pi-bonding is discussed in an attempt to relate the observed fluorine-19 NMR spectra to the stereochemistry of the complexes present. (Author)

Descriptors :   (*TITANIUM COMPOUNDS, *COMPLEX COMPOUNDS), (*NUCLEAR MAGNETIC RESONANCE, *FLUORIDES), (*HYDROLYSIS, TITANIUM COMPOUNDS), BROMIDES, MOLECULAR STRUCTURE, STEREOCHEMISTRY, CHELATE COMPOUNDS, CHEMICAL BONDS, ETHANOLS, HYDRATES, FURANS

Subject Categories : Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE