Accession Number : AD0784921

Title :   Fluorine-19 Nuclear Magnetic Resonance.

Descriptive Note : Final rept.,


Personal Author(s) : Lee,Harold G. ; Lessley,Sim D. ; Ragsdale,Ronald O.

Report Date : APR 1973

Pagination or Media Count : 35

Abstract : A detailed investigation of the reaction of a series of pyridines with titanium tetrafluoride has been carried out with high-resolution fluorine-19 nuclear magnetic resonance spectroscopy. Instead of the formation of only simple diadducts a mixture of products is found in the solvent acetonitrile. The main species are TiF4 - 2D, TiF3 - 3D(+) and TiF5 - D(-). An extensive series of TiF5 - d(-) complex ions is studied by (19)F nmr. Linear correlations of the chemical shifts of the fluorines in TiF4 - 2D and TiF5 - D(-) complexes are found with the pKa values of the substituted pyridines. Some complexes of TiF4 with bidentate ligands are reported as well as some products with sulfur containing ligands. Fluorine-19 nmr data are also given for some GeF4 - 2D adducts where D represents some substituted pyridine 1-oxides. Geometrical isomers were found with GeF4 - 2D compounds and both first and second order nmr spectra were measured. (Modified author abstract)

Descriptors :   *Pyridines, *Metal complexes, Stereochemistry, Molecular structure, Titanium compounds, Ions, Ligands, Addition reactions, Fluorides

Subject Categories : Inorganic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE