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The following articles are a selection of those recently accepted for publication in Acta Crystallographica Section E: Crystallographic Communications.
See also Forthcoming articles in all IUCr journals.
research communications (GM)research communications (GM)Synthesis, molecular and crystal structure of [(NH2)2CSSC(NH2)2]2[RuBr6]Br2·3H2O
The [RuBr6]2− anionic complex has an octahedral structure. The Ru—Br distances fall in the range 2.4779 (4)–2.4890 (4) Å. The S—S and C—S distances are 2.0282 (12) and 1.783 (2) Å, respectively. The H2O molecules, Br− ions, and NH2 groups of the cation are linked by hydrogen bonds.
research communications (GO)Synthesis, molecular and crystal structures of 4-amino-3,5-difluorobenzonitrile, ethyl 4-amino-3,5-difluorobenzoate, and diethyl 4,4′-(diazene-1,2-diyl)bis(3,5-difluorobenzoate)
Two intermediates, 4-amino-3,5-difluorobenzonitrile, C7H4F2N2 (I), and ethyl 4-amino-3,5-difluorobenzoate, C9H9F2NO2 (II), along with a visible-light-responsive azobenzene derivative, diethyl 4,4′-(diazene-1,2-diyl)bis(3,5-difluorobenzoate), C18H14F4N2O4 (III), obtained by four-step synthetic procedure, were studied using single-crystal X-ray diffraction. In the crystals of I and II, the molecules are connected by N—H⋯N, N—H⋯F and N—H⋯O hydrogen bonds, C—H⋯F short contacts, and π-stacking interactions. In the crystal of III, only stacking interactions between the molecules are found.
research communications (GO)Crystal structure of 4-bromo-5,7-dimethoxy-2,3-dihydro-1H-inden-1-one
In the title molecule, C11H11BrO3, the dihydroindene moiety is essentially planar but with a slight twist in the saturated portion of the five-membered ring. The methoxy groups lie close to the above plane. In the crystal, π-stacking interactions between six-membered rings form stacks of molecules extending along the a-axis directions, which are linked by weak C—H⋯O and C—H⋯Br hydrogen bonds.
research communications (GO)Crystal structure of Staudtienic acid, a diterpenoid from Staudtia kamerunensis Warb. (Myristicaceae)
This work presents the crystal structure of a natural diterpenoid, Staudtienic acid, isolated from the stem bark of Staudtia kamerunensis Warb (Myristicaceae). This work confirmed the results previously obtained from NOE spectroscopy.
research communications (GO)Structural multiplicity in a multi-component solvated crystal of the antiretroviral protease inhibitor Lopinavir
The multi-component solvated Lopinavir crystal was prepared using evaporative methods. The crystal structure is unusual in that although Lopinavir was crystallized in ethylene glycol (ethane-1,2-diol) alone, the unit cell contains four different components, totalling 18 molecules. The stoichiometric ratio of this crystal is eight lopinavir molecules, two ethane-1,2-diol molecules, one (E)-ethene-1,2-diol (C2H4O2) and seven water molecules.
