Geometry of the iminium moiety. IV. Structure of 4,5‐dihydro‐3,5,5‐trimethylpyrazolium aquapentachlorostannate monohydrate

Compound PYFA, 4,5-dihydro-3,5,5-trimethylpyrazolium aquapentachlorostannate monohydrate, [C 6 H 13 N 2 ] + .[SnCl 5 (H 2 O)] - .H 2 O, M r =469.2, monoclinic, P2 1 /n, a=10.788 (1), b=18.560 (1), c=8.158 (1) A, β=96.18 (1) o , V=1624.0 (3) A 3 , Z=4, D m =1.92 (1), D x =1.919 g cm -3 , λ(Mo Kα)=0.71069 A, μ=24.1 cm -1 , F(000)=920, T=294 K, R=0.026 for 2304 observed reflections with I>2σ(I). The modified anion was formed on treatment of a dihydropyrazolium hexachlorostannate (PYRA) with hexafluoroacetone trihydrate