Methylzinc or methylcadmium-N,N,N-trimethyl- propylenediaminedithiocarbamates: Precursors for zinc or cadmium sulfide. The X-ray crystal structure of methylcadmiumtrimethylpropylene- diaminedithiocarbamate benzene solvate

The reaction between [Ru3(CO)11(CNBut)] and [Pt(η-C2H4)(PPh3)2] at -30° affords a thermally unstable intermediate complex (A), which decomposes at room temperature affording, inter alia, [Ru2Pt(CO)7(PPhd3)3 (1), [RuPt2(CO)5(PPh3)3] (2), [RuPt2(CO)6(CNBut)(PPh3)] (5) and [Ru2Pt2- (CO)9(CNBut)(PPh3)] (6). The hexanuclear complexes [Ru2Pt4(CO)5-n(CNBut)(PPh3)4+n] [n = 0 (17) and 1 (18)] are obtained, with [Ru2Pt(CO)5(CNBut)(PPh3)4] (16), from reactions at 80°. Related Ru2Pt and RuPt, complexes are obtained from reactions between complex (A) and CO, CNBut, Pme3, P(C6H4Me-p)3, or P(OMe)3; related reactions between [Ru3(CO)11(CNBut)] and [Pt{P(C6H4Me-p)3}4], and between [Ru3(CO)10(CNBut)2] and [Pt(η-C2H4)(PPh3)2, are also described. The crystal structure of [RuPt2(CO)5(PPh3)3] has been determined by single-crystal X-ray diffraction methods at 295(1) K and refined by least squares to a residual of 0.035 for 6774 'observed' reflections. Crystals are triclinic, P 1, a 15.893(5), b 15.400(5), c 12.651(4) Ǻ, α 57.04(2), β 77.09(3), γ 84.10(3)°, Z 2. Crystals of the dibenzene solvate of the complex are monoclinic, P 21/c, a 11.868(4), b 18.647(8), c 29.24(1) A, β 98.35(3)°, Z 4, the structure being refined to a residual of 0.057 for 4530 'observed' reflections. Ligand dispositions are compared in detail with those observed in the analogous compound previously described with the methyldiphenylphosphine Iigand.

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A study on α-RuCl3 crystal structure by scanning tunneling microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100152124 ◽

1989 ◽

Vol 47 ◽

pp. 30-31

Author(s):

H.-J. Cantow ◽

H. Hillebrecht ◽

S. Magonov ◽

H. W. Rotter ◽

G. Thiele

Keyword(s):

Crystal Structure ◽

Density Distribution ◽

Scanning Tunneling Microscopy ◽

Electron Density ◽

Structure Determination ◽

Electron Density Distribution ◽

Scanning Tunneling ◽

Monoclinic Space Group ◽

Tunneling Microscopy ◽

X Ray

From X-ray analysis, the conclusions are drawn from averaged molecular informations. Thus, limitations are caused when analyzing systems whose symmetry is reduced due to interatomic interactions. In contrast, scanning tunneling microscopy (STM) directly images atomic scale surface electron density distribution, with a resolution up to fractions of Angstrom units. The crucial point is the correlation between the electron density distribution and the localization of individual atoms, which is reasonable in many cases. Thus, the use of STM images for crystal structure determination may be permitted. We tried to apply RuCl3 - a layered material with semiconductive properties - for such STM studies. From the X-ray analysis it has been assumed that α-form of this compound crystallizes in the monoclinic space group C2/m (AICI3 type). The chlorine atoms form an almost undistorted cubic closed package while Ru occupies 2/3 of the octahedral holes in every second layer building up a plane hexagon net (graphite net). Idealizing the arrangement of the chlorines a hexagonal symmetry would be expected. X-ray structure determination of isotypic compounds e.g. IrBr3 leads only to averaged positions of the metal atoms as there exist extended stacking faults of the metal layers.

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X-ray Crystal Structure of ?9-THC-tosylate

Planta Medica ◽

10.1055/s-2008-1075216 ◽

2008 ◽

Vol 74 (03) ◽

Author(s):

W Gul ◽

P Carvalho ◽

D Slade ◽

M Avery ◽

JR Duchek ◽

...

Keyword(s):

Crystal Structure ◽

X Ray

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Crystal structure of an inclusion complex between chiral monoaza-15-crown-5 and S(–)-1-phenyl-ethyl ammonium percholorate

Zeitschrift für Kristallographie - Crystalline Materials ◽

10.1524/zkri.218.5.381.20734 ◽

2003 ◽

Vol 218 (5) ◽

Cited By ~ 5

Author(s):

Süheyla Özbey ◽

F. B. Kaynak ◽

M. Toğrul ◽

N. Demirel ◽

H. Hoşgören

Keyword(s):

Crystal Structure ◽

Inclusion Complex ◽

Single Crystal ◽

X Ray Diffraction ◽

Space Group ◽

X Ray ◽

New Type

AbstractA new type of inclusion complex, S(–)-1 phenyl ethyl ammonium percholorate complex of R-(–)-2-ethyl - N - benzyl - 4, 7, 10, 13 - tetraoxa -1- azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray diffraction techniques. The compound crystallizes in space group

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Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

10.26434/chemrxiv.11345063.v2 ◽

2020 ◽

Author(s):

Keishiro Yamashita ◽

Kazuki Komatsu ◽

Hiroyuki Kagi

Keyword(s):

Crystal Structure ◽

High Pressure ◽

Crystal Growth ◽

Single Crystal ◽

Room Temperature ◽

Growth Technique ◽

Salt Hydrate ◽

X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

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