Kristall- und Molekülstruktur von Tetra-n-butylammonium-N-methyl-N-thioformyldithiocarbamat

Crystal and Molecular Structure of Tetra-n-butylammonium N-Methyl-N-Thioformyl Dithiocarbamate [N(n-C₄H₉)₄][S₂C? N(CH₃)? CS? H] crystallizes in the triclinic space group P1 (Z = 2) with cell dimensions (?45°C) a = 9.185(2) Å, b = 10.263(3) Å, c = 13.301(3) Å, α = 101.73(2)°, ß = 99.59(2)°, γ 100.57(2)°. The crystal structure was solved by means of direct methods and refined to a conventional reliability index R = 0.066 (R_ω = 0.070). 5945 independent intensities being measured.     

Synthese sowie Kristall- und Molekülstruktur von Tetrafluoro[2-(pyrrolidinio)ethyl]silicat

Synthesis and Crystal and Molecular Structure of Tetrafluoro[2-(pyrrolidinio)ethyl]silicate The zwitterionic tetrafluoro[2-(pyrrolidinio)ethyl]silicate ( 4 ) was synthesized by reaction of trimethoxy(2-pyrrolidinoethyl)silane ( 5 ) with hydrogen fluoride in ethanol/hydrofluoric acid at 0°C. The crystal and molecular structure of 4 was studied at ?100°C by single-crystal X-ray diffraction. In addition, 4 was characterized by solution-state NMR studies (CD₃CN: ¹H, ¹³C).     

Die Kristall- und Molekülstruktur des Hexaphenyldiplumbans

Crystal and Molecular Structure of Hexaphenyldiplumbane The crystal and molecular structure of (C₆H₅)₆Pb₂ (space group and lattice parameters see above) has been newly determined from 4541 independent reflexes by the heavy atom method; the positions of all atoms, except the H atoms have been refined to give R = 0.053. The unit cell contains two crystallographically independent molecules. (Mean values of bond lengths and angles see above).     

Kristall- und Molekülstruktur von Bis[N-(diethylaminothiocarbonyl)-benzamidin]silber(l)-nitrat

Crystal and Molecular Structure of Bis[N-(diethylaminothiocarbonyl)-benzamidine]-silver(I) Nitrate The crystal structure of bis[N-(diethylaminothiocarbonyl)-benzamidine]silver(I) nitrate has been determined by X-ray structure analysis on a single crystal. The compound is monoclinic, space group P2₁/n with a = 12.541, b = 43.470, c = 11.096 Å, β = 106.27° and 8 formula units per unit cell. The structure was solved by application of direct methods to difference structure factors (DIRDIF) and refined for 5242 observed reflections to a final R value of R = 0.070. There are two symmetrically independent molecules of the title compound in the asymmetric unit. The central Ag ion is coordinated by the S atoms of two ligands. The nitrate ions do not coordinate. The coordination geometry is slightly bent.     

Die Kristall- und Molekülstruktur des dimeren Dimethylaminodimethylindiums

Crystal and Molecular Structure of Dimeric Dimethylaminodimethylindium Dimeric dimethylamino-dimethylindium was prepared by splitting off methane from the adduct Me₃In? NHMe₂ and characterized by its vibrational spectra. The structure – determined by X-ray analysis – has shown to have the monoclinic space group P2₁/c with a = 7.601, b = 7.336, c = 14.927 Å and β = 119.9°. Patterson, Fourier and Difference synthesis were used for determing the structure, which was refined by least square analysis to an R value of 0.068.     

Bis[bis(trimethylsilyl)amino]sulfan 2. Kristall- und Molekülstruktur

Bis[bis(trimethylsilyl)amino]sulfane. 2. Crystal and Molecular Structure The title compound [(CH₃)₃Si]₂N? S? N[Si(CH₃)₃]₂ crystallizes with Z = 4 in the monoclinic space group A2/a (Nr. 15) with cell dimensions a = 22.436(4) Å, b = 6.434(5) Å, c = 17.089(6) Å, β = 117.66(2)º. For 5091 independent reflections, measured at ?80°C, the structure could be refined to R = 0.079 and R_w = 0.120. The molecules are linked together by van der Waals interactions and form layers in the bc plane, in agreement with the observed cleavage along (100).     

Kristall- und Molekülstruktur von Bis[N-(diethylaminothiocarbonyl)-N′-phenylbenzamidinato]nickel(II)

Crystal and Molecular Structure of Bis[N-(diethylaminothiocarbonyl)-N′-phenyl-benz-amidinato]nickel(II) The structure of bis[N-(diethylaminothiocarbonyl)-N′-phenyl-benzamidinato]-nickel(II) has been determined by X-ray structure analysis. The compound crystallizes in orthorhombic space group P2₁2₁2₁ with a = 16.36, b = 16.94, c = 12.96 Å and Z = 4. The solution of the structure was performed by heavy atom technique and gave a final R value of R = 0.055 for 1764 observed reflections. The coordination polyhedron has a tetrahedrally distorted shape. The ligator atoms are arranged in cis position. The chelate rings deviate clearly from planarity. Against the chelate rings the phenyl rings are appreciably twisted. The title compound is compared regarding its structure with the analogous copper chelate.     

Kristall- und Molekülstruktur von Bis[N-(diethylaminothiocarbonyl)-N′-phenylbenzamidinato]kupfer(II)

Crystal and Molecular Structure of Bis[N-(diethylaminothiocarbonyl)-N′-phenyl-benzamidinato]copper(II) The structure of bis[N-(diethylaminothiocarbonyl)-N′-phenyl-benzamidinato]-copper(II) has been determined by X-ray structure analysis. The compound crystallizes in the orthorhombic space group Pbca with a = 27.792, b = 19.197, c = 12.325 Å and 8 formula units per unit cell. The structure was solved by heavy atom technique. The final R value was R = 0.06 for 1589 observed symmetry independent reflections. The coordination polyhedron is a distorted tetrahedron. In spite of the bulky phenyl groups the ligator atoms are arranged in cis position. The chelate rings deviate clearly from planarity. The phenyl rings are appreciably twisted against the chelate rings.     

Kristall- und Molekülstruktur von 2.5-Dijod-3.4-diäthyl-1.2.5-thiadiborolen

Crystal arid Molecular Structure of 2,5-Diiodine-3,4-diethyl-1,2,5-thiadiborolene The title compound crystallizes in the triclinic space group P1 with a = 8.22, b = 8.33, c = 9.74₅ Å, α = 109.1°, β = 107.1°, γ = 102.9° and two molecules per unit cell. The two molecules are associated by a center of symmetry, forming a four-membered B–S ring, which leads to differently coordinated boron atoms in the thiadiborolene ring. The bond lengths and angles for the boron atoms are similar to those known for trigonally and tetrahedrally bonded boron, respectively. The five-membered ring is nearly planar.