Structure of tetrakis(dimethylammonium) chloride hexachlorobismuthate(III), {[(CH3)2NH2]+}4.Cl–.[BiCl6]3–

M r =641.5, orthorhombic, P2 1 2 1 2, a=10.342 (1), b=13.510 (1), c=8.693 (1) A, V=1215 A 3 , Z=2, D x =1.754 g cm -3 , λ(Cu Kα)=1.54184 A, μ=200.1 cm -1 , F(000)=620, T=293 K, R=0.059, wR=0.068, for 2059 observed reflections. The nearly perfect octahedral Cl coordination around the Bi atom shows crystallographic twofold symmetry. Both ionic interactions and strong hydrogen bridging including the N-bonded H atoms [H(11), H(12), H(21) and H(22)] and all covalent bonded Cl atoms [Cl(1), Cl(2), Cl(3)] together with an interstitial Cl atom [Cl(4)] build up a three-dimensional network with distances N-H...Cl in the range 3.02 (2)-3.57 (2) A