Tetrakis(2,2′:6′,2′′-terpyridinium) hexabromidorhenate(IV) bis[aquatetrabromidooxidorhenate(V)] tetrabromide dihydrate

Abstract

Key indicators: single-crystal X-ray study; T = 100 K; mean (C-C) = 0.009 Å; R factor = 0.036; wR factor = 0.062; data-to-parameter ratio = 20.7.The title compound, (C 15 H 13 N 3 ) 4 [ReBr 6 ][ReBr 4 O(H 2 O)] 2 -Br 4 Á2H 2 O, is a mixed-valence molecular salt containing rhenium(IV) (as centrosymmetric [ReBr 6 ] 2À anions) and rhenium(V) (as trans-[ReO(H 2 O)Br 4 ] À oxidoanions). The Re-O and Re-Br distances are consistent with the different oxidation states of Re in the anions. A complex hydrogenbonding network helps to establish the crystal packing. metal-organic compounds m1968 # 2007 International Union of Crystallography