Rhenium(V) and technetium(V) complexes of bis(o-hydroxyphenyl)phenylphosphine (PO{sub 2}{sup 2-}) and (o-hydroxyphenyl)diphenylphosphine (PO{sup -}) ligands

The synthesis of several phosphine-based chelating compounds and chelates formed between these compounds and rhenium or technetium is discussed. Four categories of products result, (i) bis-(o-hydroxyphenyl) diphenylphosphine (PO) complexes, (ii) mono- (PO) complexes, (iii) bis-bis(o-hydroxyphenyl)-phenylphosphine (PO{sub 2}) complexes, and mixed-(PO) and (PO{sub 2}) complexes. Molecular structures of these compounds (including isomers) were probed by NMR, MS, and IR spectroscopies and by X-ray crystallography.