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organic compounds
The synthetic steroid 21-acetoxy-17α-4-pregnene-3,20-dione, C23H32O4, crystallizes with a single molecule in the asymmetric unit. The molecule contains four fused rings, typical of steroids. The cyclohexene ring A has nearly the conformation of a boat. One saturated six-membered ring, B, is intermediate between chair and half-chair conformations, while the other six-membered ring, C, is essentially a chair. The five-membered ring D tends towards a twist conformation. The ring junction A/B is quasi-trans, whereas the ring junctions B/C and C/D are both trans. The molecule is slightly convex towards the β side.
metal-organic compounds
The title compound, tetrasodium bis[tris(salicylatotitanate(IV)] undecahydrate, Na4[Ti(C7H4O3)3]2·11H2O, crystallizes with two titanium salicylate complex ions, four sodium ions and 11 water molecules in the asymmetric unit. One water O atom is disordered over two positions, having 0.74 (5) and 0.26 (5) occupancy. Both Ti atoms and three sodium ions adopt a distorted octahedral coordination by O atoms. The fourth sodium ion has a distorted trigonal-bipyramidal coordination by oxygen, sharing one edge with a sodium coordination octahedron.
organic compounds
The title compound, C12H13N4+·C7H7O3S-, contains an imidazolium cation and a toluene-p-sulfonate anion in the asymmetric unit. Hydrogen-bonded dimers are formed between the cyano and amino groups of inversion-related imidazolium cations.
