Kristallstruktur von MnSO3 • H2O , eine fastsymmetrische schichtstruktur / Crystal structure of MnSO3 • H2O, a nearly symmetrical layer structure

1994 ◽  
Vol 49 (9) ◽  
pp. 1272-1276 ◽  
Author(s):  
Bernward Engelen

The crystal structure of MnSO3H2O , space group P21/n, Z = 4. Dx = 2.842(2) g · cm-3, a = 4.843(3), b = 12.807(6), c = 5.762(4) Å, β = 90.39(4)° has been determined. MnSO3·H2O crystallizes in a hitherto unknown structure type, which is closely related to that of orthorhombic MnSeO3· D2O. Coordination of Mn is octahedral involving O atom s from one water moleculeo and four different sulfite ions. The Mn-O distances range from 2.136(3) to 2.285(3)Å . The S-O distances are 1.552(3), 1.556(3) and 1.482(3)!Å. The MnO6 octahedra form layers parallel (010) by sharing four equatorial vertices. The layers are connected by weak hydrogen bonds and shifted laterally by 0.7 Å from the arrangement with m symmetry, found in MnSeO3·D2O. Due to this shift, the water molecule is asymmetrically bonded, as shown by both the O-H···O distances (2.967(4)-3.834(5)Å) and the OD stretching modes (2554 and 2576 cm-1) of partly deuterated samples

1996 ◽  
Vol 51 (10) ◽  
pp. 1464-1468 ◽  
Author(s):  
Walter Frank ◽  
Guido J. Reiß

Tris(guanidinium) hexachlororhodate(III) monohydrate, [C(NH2)3]3[RhCl6] · H2O (1 ) has been obtained by the reaction of rhodium(III) chloride with guanidine hydrochloride in hydrochloric acid solution. 1 crystallizes in the triclinic space group P1̅ (a = 7.6013(9) Å, b = 8.6912(10) Å, c = 15.956(2) Å, α = 93.177(10)°, β = 101.691(10)°, γ = 113.995(9)°, V = 931.8(2), Z = 2). Two crystallographically independent hexachlororhodate ions, three crystallographically independent guanidinium ions and one water molecule are linked by a complex framework of hydrogen bonds.


1996 ◽  
Vol 51 (3) ◽  
pp. 319-324 ◽  
Author(s):  
Silke Busche ◽  
Karsten Bluhm

Abstract Single crystals of the new compound Ba2KZn3(B3O6)(B6O13) were obtained by using a B2O3 flux technique; they crystallize in an as yet unknown structure type. X-ray investigations led to the space group Ci1-P1̄ (Nr.2) with lattice parameters a = 705.2(2), b = 712.5(2), c = 1880.3(6), a = 93.43(3)°, β = 90.72(2)°, γ = 119.57(2)°, Z = 2. The structure contains (B3O6)3--rings and a new discrete (B6O13)8- anion, which is composed of two BO4 and two B2O5 units. Zn2+ is tetrahedrally coordinated by oxygen and two out of three tenfold coordinated Ba-sites are statistically occupied by Ba2+ and K+.


Author(s):  
Wilhelm Klein

SrS2O3·H2O was obtained from an aqueous solution of Na2S2O3 and Sr(NO3)2 and crystallizes in space group P\overline{1} with all atoms at general positions. The Sr2+ ion exhibits an [8 + 1] coordination defined by two terminal S and six O atoms of thiosulfate ions, one of the latter at a longer distance, and by one O atom of a water molecule. Two thiosulfate anions act as bidentate, four as monodentate ligands. The structure consists of mainly ionically interacting layers lying parallel to the crystallographic ab plane. The layers are connected by O—H...S and O—H...O hydrogen bonds of moderate strength.


1996 ◽  
Vol 51 (3) ◽  
pp. 309-312 ◽  
Author(s):  
Silke Busche ◽  
Karsten Bluhm

Abstract Single crystals of the new compound Ba2Zn(B3O6)2 were obtained by using a B2O3 flux technique. They crystallize in an as yet unknown structure type. X-ray investigations led to space group Ci1-P1̄ (Nr.2) with lattice parameters a = 715.5(2), b = 720.5(2), c = 1178.9(4), a = 78.96(2)°, β = 85.45(2)°, γ = 60.12(1)°, Z = 2. The structure is characterized by iso­lated (B3O6)3--rings and contains two ninefold coordinated Ba-sites. Zn2+ is tetrahedrally coordinated by oxygen. The relation to the crystal structures of high-temperature BaB2O4 and Ba2Ca(B3O6)2 is discussed.


2017 ◽  
Vol 73 (12) ◽  
pp. 1875-1877
Author(s):  
Daeyoung Kim ◽  
Sung Kwon Kang

In the title compound, [Cu(C7H3NO4)(C3H4N2)(H2O)]·2H2O, the CuIIatom is coordinated by three O atoms and two N atoms, provided by a tridentate pyridine-2,6-dicarboxylate (pdc), one pyrazole and one water ligand, forming a slightly distorted square-pyramidal geometry [range of O—Cu—O and O—Cu—N bond angles = 79.55 (8)–166.22 (10)°]. The water molecule is positioned at the apical position. In the crystal, the complex molecule and the two crystallographically independent non-coordinating water molecules are linked into a supramolecular layer structure parallel to theabplaneviaO—H...O and N—H...O hydrogen bonds.


1999 ◽  
Vol 54 (7) ◽  
pp. 843-848 ◽  
Author(s):  
Christoph Mockenhaupt ◽  
Ralf Eßmann ◽  
Heinz Dieter Lutz

The crystal structure of [Ni(NH3)6]SO4 has been determined by single-crystal X-ray diffraction (P21/c; Z = 4; a = 705.0(1), b = 1195.2(2), c = 1180.0(2) pm, β = 96.14(3)°; 2271 reflections; R1 = 3.94%). In the hitherto unknown structure type, both the [Ni(NH3)6]2+ and the SO42- ions form chains along [100], The six crystallographically different ammine ligands of the distorted [Ni(NH3)6]2+ octahedra are involved in hydrogen bonds to six crystallographically equivalent SO42- ions (site symmetry C1). The strength of the hydrogen bonds differs strongly (νOD of matrix isolated NH2D molecules: 2378 - 2494 cm-1 , N ∙∙∙ O distances: 272 - 340 pm). The temperature evolution of the IR bands reveals the decrease of the dynamic orientational disorder of the NH3 molecules with decreasing temperature.


1993 ◽  
Vol 48 (5) ◽  
pp. 571-576 ◽  
Author(s):  
Axel Deeg ◽  
Dietrich Mootz

The melting diagrams of the systems benzene-HCl, toluene-HCl and mesitylene-HCl have been established and the crystal structures of two adducts determined. The adduct toluene · 2 HCl, melting incongruently at -115°C, is monoclinic with space group C2/c and Ζ = 4 formula units per unit cell; the adduct mesitylene · HCl, m. p. -64°C, is orthorhombic with space group Pbca and Ζ = 8. The HCl molecules are situated on both sides and one side, respectively, of the plane of the aromatic system and are linked to it by weak hydrogen bonds of the type Cl-H···π.


Author(s):  
Rasha A. Azzam ◽  
Galal H. Elgemeie ◽  
Mona M. Seif ◽  
Peter G. Jones

In the molecule of the title compound, C16H13N3O2S, one hydrazinic nitrogen atom is essentially planar, but the other is slightly pyramidalized. The torsion angle about the hydrazinic bond is 66.44 (15)°. Both hydrazinic hydrogen atoms lie antiperiplanar to the oxygen of the adjacent carbonyl group. The molecular packing is a layer structure determined by two classical hydrogen bonds, N—H...O=C and N—H...Nthiazole. The space group is P1 with Z = 1, which is unusual for an achiral organic compound.


2008 ◽  
Vol 63 (10) ◽  
pp. 1181-1186 ◽  
Author(s):  
Naoko Hatano ◽  
Michio Nakashima ◽  
Keizo Horiuchi ◽  
Hiromitsu Terao ◽  
Hideta Ishihara

Abstract4-Aminopyridinium tetrabromocadmate(II) monohydrate (1) crystallizes in the orthorhombic space group Pbcm with a = 6.876(2), b = 14.089(2), and c = 18.845(2) Å , Z = 4, T = 296 K. In the crystal structure, a [CdBr4]2− anion, a 4-aminopyridinium cation, and a water molecule are alternately connected into chains by hydrogen bonds N-H···Br and O-H···Br. 2,3,5,6- Tetramethylpyrazinium tetrabromocadmate(II) (2) crystallizes in the orthorhombic space group P212121 with a = 14.640(12), b = 15.615(7), c = 6.686(5) Å , Z = 4, T = 296 K. In the crystal structure, a [CdBr4]2− anion and a 2,3,5,6-tetramethylpyrazinium cation are interconnected by bifurcated hydrogen bonds N-H· · ·2Br and form infinite chains. 81Br NQR spectra with three lines with an intensity ratio of 1 : 1 : 2 (77 K ≤ T ≤ ca. 325 K) and four lines with an intensity ratio of 1 : 1 : 1 : 1 (77 K ≤ T ≤ ca. 330 K) were observed for crystalline 1 and 2, respectively, which are consistent with the crystal structure data. DSC measurements showed the existence of thermal anomalies at high temperatures in both 1 and 2.


2006 ◽  
Vol 61 (8) ◽  
pp. 979-982 ◽  
Author(s):  
Murat Taş ◽  
Hanife Saraçoğlu ◽  
Hümeyra Bati ◽  
Nezihe Çalışkan ◽  
Orhan Büyükgüngör

The molecules of the title compound, [Cu(C11H13N2O2)2], lie across centres of inversion in space group P21/c and are linked by intermolecular N-H···O and C-H···O hydrogen bonds. The central Cu atom has a slightly distorted square-planar coordination comprised of four N atoms. Cu-N bond distances are 1.975(2) and 2.020(2) Å . The interplanar angle between the phenyl and succinimidato ring is 87.34(10)°


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