A metalloporphyrin-carborane sandwich compound: synthesis and x-ray crystal structure of (OEP)Zr(.eta.5-1,2-C2B9H11)

1992 ◽  
Vol 114 (10) ◽  
pp. 3996-3997 ◽  
Author(s):  
John Arnold ◽  
Stephen E. Johnson ◽  
Carolyn B. Knobler ◽  
M. Frederick Hawthorne
Keyword(s):  
Crystal Structure ◽  
X Ray ◽  
Sandwich Compound ◽  
Compound Synthesis

Notizen: Eine neue bicyclische Zinn-Selen-Verbindung. Synthese und Kristallstruktur von [{Cp(CO)2Fe}3ClSn3Se4] / A New Bicyclic Tin Selenium Compound. Synthesis and Crystal Structure of [{Cp(CO)2Fe}3ClSn3Se4]

1993 ◽  
Vol 48 (7) ◽  
pp. 1009-1012 ◽  
Author(s):  
Kurt Merzweiler ◽  
Harald Kraus
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Unit Cell ◽  
Monoclinic Space Group ◽  
Synthesis And Crystal Structure ◽  
Selenium Compound ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants ◽  
Compound Synthesis

[{Cp(CO)2Fe}SnCl3] reacts with Na2Se in THF to form the compound [{Cp(CO)2Fe}3ClSn3Se4] 1. 1 crystallizes in the monoclinic space group P21/n with 4 formula units per unit cell. The lattice constants are α = 1435.2(7), b = 1124.4(4), c = 1972.7(12) pm, β = 94.59(4)°. According to the X-ray structure determination 1 contains a bicyclic Sn3Se4 framework.

A 1-Methyl-Phosphininium Compound: Synthesis, X-Ray Crystal Structure, and DFT Calculations

2003 ◽  
Vol 42 (40) ◽  
pp. 4940-4944 ◽  
Author(s):  
Audrey Moores ◽  
Louis Ricard ◽  
Pascal Le Floch
Keyword(s):  
Crystal Structure ◽  
Dft Calculations ◽  
X Ray ◽  
Compound Synthesis

Heteronuclear Nucleobase Complexes as Tools for the Isolation of the Minor Rotamer of the Parent Compound: Synthesis and Crystal Structure Determination of Head-Head and Head-Tail Forms of trans-[(CH3NH2)2Pt(1-MeC-N3)2]2+ (1-MeC = 1-methylcytosine)

1995 ◽  
Vol 50 (11) ◽  
pp. 1767-1776 ◽  
Author(s):  
Dagmar Holthenrich ◽  
Imre Sóvágó ◽  
Gerd Fusch ◽  
Andrea Erxleben ◽  
Edda C. Fusch ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Parent Compound ◽  
Crystal Structure Analysis ◽  
Rapid Crystallization ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Compound Synthesis ◽  
The One ◽  
Solid State Structures

The two rotamers (head-tail, 1, and head-head, 2) of the bis(1-methylcytosine)complex of trans-(CH3NH2)2Pt(II), have been crystallized as ClO4- (1, 2a) and PF6- (2b) salts and characterized by X-ray crystal structure analysis and 1H and 195Pt NMR spectroscopy. In aqueous solution, 1 is preferred over 2 by 70:30. Upon slow crystallization from H2O, 1 is obtained as the only product. Isolation of 2a and 2b has now been accomplished via formation of the heteronuclear derivative trans-[(CH3NH2)2Pt(1-MeC--N3,N4)2Hg]2+, in which the deprotonated 1-methylcytosinato ligands (1-MeC-) are oriented head-head, precipitation of Hg(II) by thiourea, and rapid crystallization of the parent compound. The solid state structures of 1 and 2b differ markedly in a number of aspects. Isolation of pure 1 and 2 permits a detailed study of the kinetics and thermodynamics of the interconversion of the two rotamers. From comparison with the behavior of 1 and 2 in H2O on the one hand and DMSO and DMF on the other a clear solvent effect on the rotamer distribution is seen which most likely relates to differences in H bonding between solvent and solute.

A 1-Methyl-Phosphininium Compound: Synthesis, X-Ray Crystal Structure, and DFT Calculations

2003 ◽  
Vol 115 (40) ◽  
pp. 5090-5094 ◽  
Author(s):  
Audrey Moores ◽  
Louis Ricard ◽  
Pascal Le Floch
Keyword(s):  
Crystal Structure ◽  
Dft Calculations ◽  
X Ray ◽  
Compound Synthesis

A novel organometallic Re/Te compound. Synthesis and X-ray crystal structure of the complex [Re(CO)3(PEt3)2Te2Re(CO)3(PEt3)]2

1998 ◽  
Vol 1 (4) ◽  
pp. 150-151 ◽  
Author(s):  
Franco Cecconi ◽  
Carlo A. Ghilardi ◽  
Stefano Midollini ◽  
Annabella Orlandini
Keyword(s):  
Crystal Structure ◽  
X Ray ◽  
Compound Synthesis

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
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