The formation of a cyclohexadienone at a dimolybdenum centre; X-ray crystal structure of [Mo2(µ-{η4-CMe2·CH·CH·CH·C(But)CO})-(CO)2(η-C5H5)2], and evidence for an unusual bonding mode for a bridging 1,3-diene ligand

1983 ◽  
pp. 181-183 ◽  
Author(s):  
Michael Green ◽  
A. Guy Orpen ◽  
Colin J. Schaverien ◽  
Ian D. Williams
Keyword(s):  
Crystal Structure ◽  
X Ray ◽  
Bonding Mode

A new bonding mode for salicylate: The X-ray crystal structure of (pyH)[MoO2(Hsal)(sal)]

Polyhedron ◽  
1992 ◽  
Vol 11 (20) ◽  
pp. 2711-2712 ◽  
Author(s):  
Catherine F. Edwards ◽  
William P. Griffith ◽  
Andrew J.P. White ◽  
David J. Williams
Keyword(s):  
Crystal Structure ◽  
X Ray ◽  
Bonding Mode

A novel coordination mode for a pyridylphosphine ligand. X-ray structures of [RuCl2(NO)L] (I) and [RuCl2(NO)L]·DMSO (II) (L = [(2-py)2PC2H4POO(2-py)2]-)

2001 ◽  
Vol 79 (5-6) ◽  
pp. 1030-1035 ◽  
Author(s):  
Alzir A Batista ◽  
Salete L Queiroz ◽  
Peter C Healy ◽  
Robbie W Buckley ◽  
Sue E Boyd ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Key Words ◽  
Coordination Mode ◽  
Ruthenium Complex ◽  
Distorted Octahedron ◽  
Monoclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Ruthenium Atom ◽  
Bonding Mode

The ruthenium(II) complex, [RuCl2(NO)L] (I), (L = [(2-py)2PC2H4PO2(2-py)]-) was obtained from recrystallization of RuCl3NO(d2pype) (d2pype = (2-py)2PC2H4P(2-py)2) in the presence of HNO3, crystallizing in the monoclinic space group P21 (no. 4), with a = 8.012(4) Å, b = 14.454(4) Å, c = 9.353(3) Å, β = 105.77(3)°, and Z = 2. Crystals of the DMSO solvate of the complex (II) were obtained from (CD3)2SO solution, crystallizing in the monoclinic space group P21/c (no.14) with a = 9.7080(2) Å, b = 22.2920(5) Å, c = 11.5230(3) Å, β = 92.0450(10)°, and Z = 4. In both complexes, the geometry about the ruthenium atom is a distorted octahedron mainly as a result of the tridentate [P,N,O]-bonding mode of L. The ν (NO) bands at 1875 cm–1 in both complexes are consistent with the linear disposition of the NO group and the Ru atom as is observed in the X-ray crystal structure (Ru-N1-O1 angle = 178.5(4)°).Key words: pyridylphosphine, nitrosyl, ruthenium complex, X-ray structure.

P—Η-funktionelle Zirkonocen-Phosphido-Komplexe und Struktur eines Diazoalkan-Insertionsprodukts / P—H Functionalized Zirconocene Phosphido Complexes and the Crystal Structure of a Diazoalkane Insertion Product

1989 ◽  
Vol 44 (12) ◽  
pp. 1538-1544 ◽  
Author(s):  
Evamarie Hey ◽  
Ulrich Müller
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Pure State ◽  
Crystal Data ◽  
X Ray ◽  
Data Space ◽  
Insertion Product ◽  
Cell Dimensions ◽  
Bonding Mode

The reaction of Cp2ZrCl2 with [Li(THF)2PHMes]n(1) Mes = 2,4,6-Me3–C6H2) at –78°C yields Cp2Zr(PHMes)(X), with X = Cl (2) (1:1 reaction), X = PHMes (3) (1:2 reaction). Although 2 and 3 could not be obtained in a pure state, NMR spectroscopic investigations confirm the proposed formulae. 2 reacts with diphenyldiazomethane at ambient temperature with insertion of the N2CPh2 molecule into the Zr–P bond and formation of [xxx] (4). An X-ray structure determination of 4 shows the η2-bonding mode of the phosphinohydrazonido(1–) ligand to the Zr atom (Zr–N(1) 2.181(6) A; Zr–N(2) 2.205(6) A). Crystal data: space group P21/n, Z = 4, (2581 observed independent reflexions, R = 0.063). Cell dimensions (19°C): a = 11.820(2), b = 18.361(2), c = 13.758(2) Å, β = 103.86(2)°.

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

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.

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

Planta Medica ◽  
2008 ◽  
Vol 74 (03) ◽  
Author(s):  
W Gul ◽  
P Carvalho ◽  
D Slade ◽  
M Avery ◽  
JR Duchek ◽  
...  
Keyword(s):  
Crystal Structure ◽  
X Ray

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

2003 ◽  
Vol 218 (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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