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The crystal structures of the condensed bromocadmate anions with chains built of [CdBr 3 ] ∞  were de-termined by X-ray structure analysis at 300 K. In addition, the temperature dependence of the  81 Br NQR frequencies was observed. [(t-C 4 H 9 NH 3 )CdBr 3 ] 2 -H 2 O (1) tallizes with a double Br bridged chain (monoclinic, P2/c, Z = 4, a = 1963.4(8), b 87.7(4), c 1432.1(6) pm, and ß= 110.66(2)°). Six  81 Br NQR lines are observed at temperatures between 77 and 330 K. (i-C 3 H 7 NH- 3 )CdBr 3  (2) crystalliz-es with a triple Br bridged chain (orthrhombic, Pbca, Z= 8, a = 1975.4(6), b = 1415.8(4), c = 690.1(2) pm). (2) shows three  81 Br NQR lines at temperatures between 77 and 193 K. A phase transition occurs at 224 K. The structure of [(CH 3 ) 3  NH] 3 Cd 2 Br 7 ] (3) was redetermined. (3) consists of a triple Br bridged chain and a discrete [CdBr 4 ] tetrahedron (hexagonal, P6 3 mc, Z= 8, a = 1483.5(2), c = 685.7(5) pm). The structure of (3) is identical to the one reported by Daoud, Perret, and Dusausoy, Acta Crystallogr., B35, 2718 (1979). Three  81 Br NQR lines are observed at temperatures between 77 and 243 K.

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Isolated versus Condensed Anion Structure V: X-ray Structure Analysis and  81 Br NQR of t-butylammonium tribromocadmate(II)-1/2 water, i-propylammonium tribromocadmate(II), and tris-trimethylammonium heptabromodicadmate(II)