Reactions of Pertechnetate Anion with Triphenylphosphine. Molecular Structure (at -100 deg C) of (1,1-Dimethyl-3-oxobutyl)triphenylphosphonium Pentachloro(triphenylphosphine)technetate(IV)

Article abstract of DOI:10.1039/DT9820001381

The reactions of the (-1) anion with PPh3 in various concentrations of HCl are reported. , (-1), and (-2) were obtained and the anionic complexes were isolated with cations such as (+1), (+1), or (+1).The crystal structure of the title complex was determined at -100 deg C from 1 761 independent reflections and refined to R= 0.065.Crystals are monoclinic, space group P21/n, a = 21.909(4), b = 18.963(4), c = 9.896(3) Angstroem, β = 103.05(5), and Z = 4.The structure consist of well separated units of octahedral (-1) anions, and tetrahedral phosphonium cations, in which the phenyl groups are in a 'propeller' configuration around P.Selected bond distances and angles are Tc-Cl(mean) 2.34(1), Tc-P 2.57(1) Angstroem, Cl-Tc-Cl(mean) 90.7(4), Cl-Tc-P 88.7(4) deg.

Full text of DOI:10.1039/DT9820001381

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