Tetrachlorobis(N1-phenylacet­amidino-κN2)rhenium(IV) at 11 K by X-­ray diffraction and at 20 K by neutron diffraction

The crystal structure of the title compound, [ReCl₄(C₈H₁₀N₂)₂], has been determined by X-ray diffraction at 11 K and by neutron diffraction at 20 K. The accurate and extensive data sets lead to more precise determinations than are available from earlier work. The agreement in atomic positional and displacement parameters at these very low temperatures is good. The results will facilitate re-examination of the magnetic structure of the complex. The Re atom lies on a special position and the molecule has twofold crystallographic symmetry.