(1974, Vol. IV) 1.486 (6) C(I 2)---<2 (13) 1.517 (6) C(12)---C(14)1.526 (6)110.9 Symmetry codes: (i) x, 1 + y, ½,½-z;(iv) x-l,Y,Z. CAMERON (Pearce & Watkin, 1993). Software used to prepare material for publication: CRYSTALS.HRP wishes to thank the CCDC and the University Chemical Laboratories, Cambridge, for the use of X-ray diffraction and computing facilities.Lists of structure factors, anisotropic displacement parameters, Hatom coordinates and complete geometry have been deposited with the IUCr (Reference: HU1140). (Received 20 December 1995; accepted 22 March 1996) Abstract In the title compound, C6H16N+.Br -, each diisopropylammonium cation interacts with the bromide anion via two hydrogen bonds leading to an infinite onedimensional chain of molecules in the crystal. The cation has an approximate twofold axis of symmetry. CommentDiisopropylammonium bromide (I) was obtained in the course of studying the reaction of BrRe(CO)5 with lithium diall~lamides with the intention of generating lithium carbamoylmetallates as precursors for amino-