Crystal Structures of Piperazinium Tetrabromocadmate(II)-Monohydrate [C

Crystal Structures of Piperazinium Tetrabromocadmate(II)-Monohydrate [C

H

N

]CdBr

· H

O, Piperazinium Tetraiodocadmate(II) [C

H

N

]CdI

, and Bis(trimethylsulphonium) Tetrabromocadmate(II) [(CH

)

S]

CdBr

Hideta Ishihara

, Keizo Horiuchi

, Thorsten M. Gesing

, Shi-qi Dou

, J.-Christian Buhl

, and Peter Erk

aFaculty of Culture and Education, Saga University, Saga 840-8502, Japan

bFaculty of Science, University of the Ryukyus, 1 Senbaru, Okinawa 903-0213, Japan

cInstitut f¨ur Mineralogie, Universit¨at Hannover, Welfengarten 1, D-30167 Hannover

dPigments Research, ZDP/F - J 550, BASF AG, D-67056 Ludwigshafen Reprint requests to Prof. H. I. E-mail: isiharah@cc.saga-u.ac.jp

Z. Naturforsch.57 b,503–508 (2002); received November 2, 2001 Crystal Structure, Halogenocadmate(II)

Piperazinium tetrabromocadmate(II)-monohydrate, [C4H12N2]CdBr4H2O (1) crystallizes with isolated [CdBr4]² anions, piperazinium cations, and water molecules (monoclinic, P21/c, Z = 4, a = 698.7(1), b = 1348.6(3), and c = 1432.4(3) pm,= 92.97(3)at 293 K). The crystal structure of1is almost the same as that reported in Inorg. Chim. Acta187, 141 (1991). The crystal of piperazinium tetraiodocadmate(II), [C4H12N2]CdI4(2) consists of isolated [CdI4]² anions and piperazinium cations (orthorhombic, P212121, 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) tetrabro- mocadmate(II), [(CH3)3S]2CdBr4(3) has isolated [CdBr4]² anions and trimethylsulphonium cations (orthorhombic, P212121, Z = 4, a = 911.3(1), b = 1329.2(2), and c = 1454.7(2) pm at 293 K).