Dichloro­(di-2-pyridylamine)zinc(II): a redetermination at 110 K

The title compound, [ZnCl₂(C₁₀H₉N₃)], has been investigated at 110 K. In contrast with the previously published room-temperature structure [Ho et al. (1999). J. Chem. Soc. Dalton Trans. pp. 1581-1586], the amine N atom is found to have a symmetrical planar environment. The two independent Zn-Cl distances are significantly different, but the difference of 0.0414 (3) Å is within the range found in other tetra­hedral ZnCl₂ complexes.

trans-Dichloro­bis(tris­{4-[(dimethyl­amino)meth­yl]phen­yl}phosphine)platinum(II)

Crystals of the title compound, [PtCl₂(C₂₇H₃₆N₃P)₂], as the trans-isomer were obtained from the originally formed cis-isomer after standing for more than four months in solution. In the crystal structure, the Pt atom is located on an inversion centre, which makes the mol­ecular structure similar to the triphenyl­phosphine analogue. The amino groups are pyramidal and do not inter­act with Pt atoms or hydrogen-bond donors.