The Crystal-Structure of Tetraphenylarsonium Tetrachlorooxotechnetate(V)

Abstract

The crystal structure of [AsPh₄] [TcOCl₄] (1) has been determined by X-ray diffraction. Crystals are tetragonal, space group P4/n, a 12.664(1), c 7.822(1) Å , Z = 2. Refinement based on 912 data measured with Cu Ka radiation converged with R 0.059. The structure consists of discrete [AsPh₄]⁺ cations and [TcOCl₄]^- anions with the technetium atom in a square-pyramidal environment. In contrast to an earlier structural determination of the [TcOCl]-anion in [N(PPh₃)₂] [TcOCl₄], the [TcOCl₄]-anion in (1) possesses ideal symmetry. The Tc =O bond length is 1.593(8) Å with Tc -CI 2.309(2) Å.