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Crystal Structures of Piperazinium Tetrabromocadmate(II)-Monohydrate [C<sub>4</sub>H<sub>12</sub>N<sub>2</sub>]CdBr<sub>4</sub> · H<sub>2</sub>O, PiperaziniumTetraiodocadmate(II) [C<sub>4</sub>H<sub>12</sub>N<sub>2</sub>]CdI<sub>4</sub>, and Bis(trimethylsulphonium) Tetrabromocadmate(II) [(CH<sub>3</sub>)<sub>3</sub>S]<sub>2</sub>CdBr<sub>4</sub>
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2002
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Piperazinium tetrabromocadmate(II)-monohydrate, [C 4 H 12 N 2 ]CdBr 4 · H 2 O (1) crystallizes with isolated [CdBr 4 ] 2- anions, piperazinium cations, and water molecules (monoclinic, P2 1 /c, Z = 4, a = 698.7(1), b = 1348.6(3), and c = 1432.4(3) pm, β = 92.97(3)˚ at 293 K). The crystal structure of 1 is almost the same as that reported in Inorg. Chim. Acta 187, 141 (1991). The crystal of piperazinium tetraiodocadmate(II), [C 4 H 14 N 2 ]CdI 4 (2) consists of isolated [CdI 4 ] 2- anions and piperazinium cations (orthorhombic,P2 1 2 1 2 1 , Z=4, a = 903.2(5), b = 1226.3(6), and c = 1307.9(7) pm at 293 K). The room temperature phase of bis(trimethylsulphonium) tetrabromocadmate( II), [(CH 3 ) 3 S] 2 CdBr 4 (3) has isolated [CdBr 4 ] 2- anions and trimethylsulphonium cations (orthorhombic, P2 1 2 1 2 1 , Z = 4, a = 911.3(1), b = 1329.2(2), and c = 1454.7(2) pm at 293 K).