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.     

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).     

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.     

Die Kristall- und Molekülstruktur von Dicäsium- μ-Oxodekafluorodiarsenat

Crystal and Molecular Structure of Dicaesium-μ-Oxodecafluorodiarsenate, Cs₂(As₂F₁₀O) The crystal structure of Cs₂(As₂F₁₀O) has been determined from three-dimensional data. The compound crystallizes in the monoclinic space group P2₁/m, the lattice constants being a = 9.175(4), b = 10.690(5), c = 5.619(3)(Å); β = 105,50(5)°. The anion (As₂F₁₀O)^2– with the point symmetry C_s contains a As? O? As-bridge, whose partial π-bonding is to be discussed. The bond lengths and angles are: As? O: 1.77(2) and 1.68(2) Å, resp., As? O? As: 139(1)°; As…As: 3.225(4) Å, the numbers in parantheses being the standard deviation of the last figure.     

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.     

Kristall- und Molekülstruktur der solvatfreien Hexamethyldisilazide des Rubidiums und Caesiums und die Kristallstruktur eines Toluolsolvates

Crystal and Molecular Structure of the Solventfree Hexamethyldisilazides of Rubidium and Cesium and the Crystal Structure of a Toluene Solvate X-ray crystal structures are reported for the dimeric rubidium and cesium hexamethyldisilazides [MN(SiMe₃)₂]₂. [RbN(SiMe₃)₂]₂ ( 1 ) crystallizes in the monoclinic space group P2₁/c with a = 1044.7(2), b = 891.1(2), c = 1281.0(3) pm, β = 100.26(2) °, Z = 2. [CsN(SiMe₃)₂]₂ ( 2 ) crystallizes in the orthorhombic space group Pbca with a = 1270.81(2), b = 1281.16(1), c = 1539.65(2) pm, Z = 4. Both compounds contain a four-membered [M–N–]₂-ring located on an inversion centre. The M–N bond lengths are: 287.8(2), 295.6(2) pm ( 1 ) and 307.4(2), 314.9(2) pm ( 2 ). The solvate [CsN(SiMe₃)₂]₂ · C₇H₈ ( 3 ) crystallizes from toluene in the triclinic space group P1 with a = 854.00(2), b = 979.58(2), c = 1084.45(3) pm, α = 111.482(1), β = 93.821(1), γ = 108.546(1)°, Z = 1. In this compound dimeric units [CsN(SiMe₃)₂]₂ and toluene molecules form a polymeric chain.     

Kristall- und Molekülstruktur von Bis(pyridin)bis(trifluoromethyl)zink

Crystal and Molecular Structure of Bis(pyridine)bis(trifluoromethyl)zinc Bis(pyridin)bis(trifluoromethyl)zinc 1 has been isolated and characterized by means of single-crystal X-ray diffraction techniques. The title compound represents the first structure determination of a fully fluorinated alkylzinc compound (monoclinic, space group P2₁/c, Z = 4, a = 8.856(3), b = 18.158(3), c = 8.979(3) Å, β = 98.14(2)°, R = 0.054, R_w = 0.035). The zinc atom is in a distorted tetrahedral environment. The molecular structure of [ClZn(CCl₂CF₃) η₂O]₂ 2 was solved, but is not included in a structural comparison due to crystallographic disorder.     

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).     

Reaktion von Acetamidin mit Kohlenstoffdisulfid 5. Kristall- und Molekülstruktur der N-Acetimidoyldithiocarbamidsäure

On Chalcogenolates. 176. Reaction of Acetamidine with Carbon Disulfide. 5. Crystal and Molecular Structure of N-Acetimidoyl Dithiocarbamic Acid N-Acetimidoyl dithiocarbamic acid crystallizes with Z = 8 in the monoclinic space group P2₁/c (No. 14) with cell dimensions a = 9.502(3) Å, b = 11.585(1) Å, c = 10.765(3) Å, β = 92.19(4)°. The crystal structure has been determined from single crystal X-ray data measured at 21°C and refined to a conventional R of 0,043 for 3450 independent reflections (R_w = 0,050). The acid exists in the dipolar form in two different conformations. The molecules are roughly plane. They are linked together by different S…?H? N hydrogen bridges.