Acta Crystallographica Section CActa Crystallographica Section C: Crystal Structure Communications is a rapid communication journal for the publication of concise reports on crystal and molecular structures. The numerical and text descriptions of each structure are submitted to the journal electronically as a Crystallographic Information File (CIF) and are checked and typeset automatically prior to peer review. The published paper contains an encapsulation of the data that are essential to understanding the main features of...Sodium iodine(V) oxyfluoride, NaIO2F2- June 7, 2008 As an extension of a general structural study concerning fluorides and oxyfluorides of cations presenting a stereochemically active electronic lone pair, until now limited to tellurium(IV) phases, the previously unknown structure of NaIO2F2 corresponds to a new structure type based on isolated IO2F2 polyhedra forming sheets separated by Na+ layers. The sodium ion is octahedrally coordinated with 2m site symmetry, while the IV atom has m2m symmetry with a stereochemically active lone electron...http://scripts.iucr.org/cgi-bin/paper?sq3127 Ce20Mg19Zn81: a new structure type with a giant cubic cell- June 7, 2008 Icosacerium nonadecamagnesium henoctacontazinc, Ce20Mg19Zn81, synthesized by fritting of the pure elements with subsequent arc melting, crystallizes with an unusually large cubic unit cell space group Foverline43m, a = 21.1979(8) and represents a new structure type among the technologically important family of ternary rare earthtransition metalmagnesium intermetallics. The majority of atoms (two Ce and five Zn) display .3m site symmetry, two Ce and one Mg atom occupy three 2.mm positions, one...http://scripts.iucr.org/cgi-bin/paper?sq3145 A dihydroxidotetracopper(II) framework supported by 4,4-(adamantane-1,3-diyl)bis(1,2,4-triazole) and benzene-1,3,5-tricarboxylate bridges- June 7, 2008 The new bifunctional ligand 4,4-(adamantane-1,3-diyl)bis(1,2,4-triazole) (tr2ad) and benzene-1,3,5-tricarboxylate sustain complementary coordination bridging for the three-dimensional framework of polybis3-4,4-(adamantane-1,3-diyl)bis(1,2,4-triazole)-3N1:N2:N1bis(4-benzene-1,3,5-tricarboxylato-4O1:O1:O3:O5)di-3-hydroxido-6O:O:O-tetracopper(II) dihydrate, Cu4(C9H3O6)2(OH)2(C14H18N6)22H2On. The net node is a centrosymmetric (3-OH)2Cu4 cluster CuO = 1.9525(14)2.0770(15) and Cu...Cu = 3.0536(5)...http://scripts.iucr.org/cgi-bin/paper?jz3138 A three-dimensional net of -tris(1,10-phenanthroline)ruthenium(II) in the dual-metal self-assembly of bistris(1,10-phenanthroline)ruthenium(II) tetrai- June 7, 2008 The title compound, Ru(C12H8N2)32Fe(NCS)4(ClO4)2, crystallizes in a tetragonal chiral space group (P41212) and the assigned absolute configuration of the optically active molecules was unequivocally confirmed. The -RuII(phen)32+ complex cations (phen is 1,10-phenanthroline) interact along the 41 screw axis parallel to the c axis, with an Ru...Ru distance of 10.4170(6), and in the ab plane, with Ru...Ru distances of 10.0920(6) and 10.0938(6), defining a primitive cubic lattice. The Fe atom is...http://scripts.iucr.org/cgi-bin/paper?ln3097 Hydrogen-bonded sheets in 2-(2-aminophenyl)-1H-benzimidazol-3-ium dihydrogen phosphate- June 7, 2008 The title salt, C13H12N3+H2PO4, contains a nonplanar 2-(2-aminophenyl)-1H-benzimidazol-3-ium cation and two different dihydrogen phosphate anions, both situated on twofold rotation axes in the space group C2. The anions are linked by OH...O hydrogen bonds into chains of R22(8) rings. The anion chains are linked by the cations, via hydrogen-bonding complementarities and electrostatic interactions, giving rise to a sheet structure with alternating rows of organic cations and inorganic anions....http://scripts.iucr.org/cgi-bin/paper?gd3204 Dynamic disorder in a pentacoordinate silicon complex with 2,2-diazenediyldiphenol- June 7, 2008 The crystal structure of (2,2-diazenediyldiphenolato-3O,N,O)dimethylsilicon, C14H14N2O2Si, determined at four temperatures, reveals a dynamic disorder as a result of a flipping of the orientation of the CN=NC unit. The population of the two conformers in the single crystal depends on the temperature and cooling rate. It is possible to minimize the disorder by cooling the crystal slowly.http://scripts.iucr.org/cgi-bin/paper?ln3102 2-N-(2,3-Dimethylphenyl)carbamoylbenzenesulfonamide and the 3,4- and 2,6-dimethylphenyl analogues- June 7, 2008 The structures of 2-(2,3-dimethylphenyl)carbamoylbenzenesulfonamide, 2-(3,4-dimethylphenyl)carbamoylbenzenesulfonamide and 2-(2,6-dimethylphenyl)carbamoylbenzenesulfonamide, all C15H16N2O3S, are stabilized by extensive intra- and intermolecular hydrogen bonds. In all three structures, the sulfonamide and carbamoyl groups are involved in hydrogen bonding. In the 2,3-dimethyl and 2,6-dimethyl derivatives, dimeric units and chains of molecules are formed parallel to the c axis. In the 3,4-dimethyl.http://scripts.iucr.org/cgi-bin/paper?hj3076 Hydrogen-bonding interactions in (3,4-dimethoxyphenyl)acetic acid monohydrate- June 7, 2008 The crystal structure of the title compound, C10H12O4H2O, consists of (3,4-dimethoxyphenyl)acetic acid and water molecules linked by OH...O hydrogen bonds to form cyclic structures with graph-set motifs R12(5) and R44(12). These hydrogen-bond patterns result in a three-dimensional network with graph-set motifs R44(20) and R44(22), and the formation of larger macrocycles, respectively. The CC bond lengths and the endocyclic angles of the benzene ring show a noticeable asymmetry, which is...http://scripts.iucr.org/cgi-bin/paper?av3147 |