Key indicators: single-crystal X-ray study; T = 100 K; mean (C-C) = 0.008 Å; R factor = 0.039; wR factor = 0.069; data-to-parameter ratio = 42.3.The title compound, (C 6 H 9 N 2 ) 2 Á[ReO(H 2 O)Br 4 ]ÁBr, is a molecular salt incorporating rhenium(V)-containing oxoanions. The oxoanion shows a distorted trans-ReO 2 Br 4 geometry. In the crystal structure, the component species are connected via N-HÁ Á ÁBr and O-HÁ Á ÁBr interactions.
ExperimentalCrystal data (C 6 H 9 N 2 ) 2 Á[ReO(H 2 O)Br 4 ]ÁBr M r = 838.07 Monoclinic, P2 1 =c a = 11.996 (2) Å b = 12.154 (3) Å c = 18.206 (3) Å = 125.43 (2) V = 2162.9 (7) Å 3 Z = 4 Mo K radiation = 14.87 mm À1 T = 100 (2) K 0.08 Â 0.08 Â 0.07 mm Data collection Kuma KM4 CCD diffractometer Absorption correction: numerical (CrysAlis RED; Oxford Diffraction, 2003) T min = 0.340, T max = 0.563 40507 measured reflections 10288 independent reflections 5873 reflections with I > 2(I) R int = 0.080