Crystal and molecular structure of two Zn–Cu compounds: Zn(NH3)2Cu(CN)3 and [Zn(en)3]6[Cu5(CN)17] · nH2O (n = 8.4) containing novel [Cu2(CN)7]5− ion

1994 ◽  
Vol 209 (5) ◽  
Author(s):  
J. Černák ◽  
J. Chomič ◽  
C. Kappenstein ◽  
M. Dunaj-Jurčo
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Structure Analysis ◽  
Crystal And Molecular Structure ◽  
Crystal Structure Analysis ◽  
Bimetallic Complexes

AbstractThe result of crystal structure analysis of two Zn–Cu bimetallic complexes are reported. Poly-[diammine-zinc(II)-tricyanocuprate(I)], CHexakis-[tris(ethylenediamine)-zinc(II)-tricyanocuprate bis[heptacyanodicuprate)-

Crystal and Molecular Structure of Cycasin, (Z)-β-D-Glucopyranosyloxy-NNO-azoxymethane

1995 ◽  
Vol 48 (5) ◽  
pp. 1059 ◽  
Author(s):  
ME Tate ◽  
IM Delaere ◽  
GP Jones ◽  
ERT Tiekink
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Structure Analysis ◽  
Crystal And Molecular Structure ◽  
Crystal Structure Analysis ◽  
Monoclinic Space Group ◽  
Cell Dimensions ◽  
Cycas Revoluta ◽  
Unit Cell Dimensions

Characterization of cycasin , (Z)-β-D-glucopyranosyloxy-NNO-azoxymethane, from Cycas revoluta Thunb . is reported. A crystal structure analysis shows the azoxy substituents adopt a Z configuration. The colourless crystals are monoclinic, space group C2 with unit cell dimensions a 15.409(4), b 4.855(4), c 15.752(4) Ǻ, β 109.87(2)°, Z 4; the structure was refined to final R 0.033, 886 reflections with I ≥ 3.0σ(I) being used.

Crystal and molecular structure of unsubstituted and p-methoxy-substituted acetylbenzoylmethanatoboron difluoride

1997 ◽  
Vol 212 (5) ◽  
Author(s):  
Y. Dromzée ◽  
J. Kossanyi ◽  
V. Wintgens ◽  
P. Valat ◽  
H. Hartmann ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Least Squares ◽  
Crystal Structures ◽  
Structure Analysis ◽  
Crystal And Molecular Structure ◽  
Direct Methods ◽  
Crystal Structure Analysis ◽  
Full Matrix

AbstractThe crystal structures of two borines were solved by direct methods and refined by full-matrix least-squares procedure. 6-methyl-4-phenyl-1,3,2-(2The crystal structure analysis of compound

Molekülstruktur des 7-Methyl-1.3.5-triaza-7-phosphaadamantan-7-ium-tetrafluoroborats. Darstellung und Charakterisierung des 7-Methyl-1.3.5-triaza-7-phospha-tricyclo[3.3.2.13,7]-undecan-7-ium-iodids/Molecular Structure of 7-Methyl-1 ,3,5-triaza-7-phosphaadamantane-7-ium-tetrafluoroborate. Preparation and Characterization of 7-Methyl-1,3,5-triaza-7-phospha-tricyclo[3,3,2,1 3,7]-undecan-7-ium-iodide

1978 ◽  
Vol 33 (11) ◽  
pp. 1257-1262 ◽  
Author(s):  
Kurt H. Jogun ◽  
John J. Stezowski ◽  
Ekkehard Fluck ◽  
Hans-Jürgen Weißgraeber
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Nmr Spectroscopy ◽  
Structure Analysis ◽  
Ir Spectrum ◽  
Parent Compound ◽  
Crystal Structure Analysis ◽  
H Nmr

Abstract 7-Methyl-1,3,5-triaza-7-phosphaadamantane-7-ium-tetrafluoroborate (2b) has been synthesized and characterized by crystal structure analysis. The crystal structure is interpreted in comparison with the parent compound 1,3,5-triaza-7-phosphaadamantane, and its 7-oxide and 7-sulfide. 7-Methyl-1,3,5-triaza-7-phospha-tricyclo[3,3,2,1 3,7]-undecan-7-ium-iodide (6) has been prepared and characterized by 31P, 13C, and 1H NMR spectroscopy and by its IR spectrum.

The crystal and molecular structure of bis(2,3-butanedione dioximato)chloro-(hydroxodiphenylarsine)cobalt(III): assignment of the nature of the arsenic-based ligand

1984 ◽  
Vol 62 (2) ◽  
pp. 285-288 ◽  
Author(s):  
Monica Pizzey ◽  
Lynn Mihichuk ◽  
Richard J. Barton ◽  
Beverly E. Robertson
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Oxygen Atom ◽  
Least Squares Method ◽  
Crystal And Molecular Structure ◽  
Crystal Structure Analysis ◽  
Arsenic Compound ◽  
Single Bond ◽  
Orthorhombic Space Group ◽  
Cl Atom

The Co(II) cobaloximes, (B)Co(dmgH)2 (where B = phosphine or phosphite; dmgH = dimethylglyoximato monoanion) react with (C6H5)2AsCl to form ClCo(dmgH)2B and a compound of formula C20H25AsClCoN4O5. A crystal structure analysis of the arsenic compound indicated it to be bis(2,3-butanedione dioximato)chloro(diphenylhydroxoarsine)cobalt(III), [(C6H5)2As(OH)Co(dmgH)2Cl]. The crystals are orthorhombic, space group Pna21, a = 15.334(2), b = 11.173(2), c = 13.745(4) Å at 19(2) °C with Z = 4. The structure has been refined by the least-squares method to a weighted residual of 0.071 using 2345 independent reflections. The Co atom is bonded equatorially to two dmgH ligands (average [Co—N] = 1.89(1) Å) with a Cl atom above this plane ([Co—Cl] = 2.252(2) Å) and the As atom of the (C6H5)2As(OH) group below it ([Co—As] = 2.322(1) Å). The [As—O] bond length is 1.781(7) Å, corresponding to a single bond and is consistent with the observed H atom on the oxygen atom.

Darstellung und Molekülstruktur des Ferrocenylkomplexes CpW(NO)2Fc und seine Oxidation zu CpWO2Fc/Synthesis and Molecular Structure of the Ferrocenyl Complex CpW(NO)2Fc and its Oxidation to CpWO2Fc

1986 ◽  
Vol 41 (11) ◽  
pp. 1431-1436 ◽  
Author(s):  
Max Herberhold ◽  
Heidemarie Kniesel ◽  
Ludwig Haumaier ◽  
Alfred Gieren ◽  
Catalina Ruiz-Péreza
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Bond Length ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
X Ray

Abstract The σ-ferrocenyl complex CpW (NO)2Fc (1) was prepared from CpW (NO)2Cl and ferrocenyl lithium, and oxidized by air in CH2Cl2 solution to give CpWO2Fc (2). An X-ray crystal structure analysis of 1 indicated the presence of two almost linear nitrosyl groups (with W -N -O angles of 173.0(9) and 175.4(7)°). The W -C (ferrocenyl) bond length is 2.164(10) Å.

Crystal and Molecular Structure and Biological Activity of Z)-(Benzoyloxymethyl-NNO-azoxy)methane

1997 ◽  
Vol 50 (7) ◽  
pp. 771
Author(s):  
Max E. Tate ◽  
Ian M. Delaere ◽  
Graham P. Jones ◽  
Alan A. Seawright ◽  
Edward R. T. Tiekink
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Spinal Cord ◽  
Crystal And Molecular Structure ◽  
Crystal Structure Analysis ◽  
Monoclinic Space Group ◽  
Liver Changes ◽  
Brain And Spinal Cord ◽  
The Brain

Characterization of (benzoyloxymethyl-NNO-azoxy)methane, from benzoylation of the cycasin aglycone methylazoxymethanol, commonly referred to as MAM, is reported. Crystal structure analysis shows that the azoxy substituents have the Z configuration. Crystals are monoclinic, space group P21/c, a 7·436(2), b 8·771(2), c 14·640(1) Å, β 90·73(1)°, Z 4; the structure was refined to final R 0·048 by using 1171 reflections with I ≥ 3·0σ(I ). Subcutaneous injection of (Z)-(benzoyloxymethyl-NNO-azoxy)methane in mice showed liver changes typical of the corresponding MAM acetate-induced hepatotoxicity. This permits correlation of hepatotoxic effects with the Z configuration of the aglycone. Histological examination of the brain and spinal cord revealed no significant changes at a dosage of 52· 6 mg/kg.

X-Ray Crystal Structure Analysis of Factor A (2-Methyladeninyl-cyanocobamide), a Native Vitamin B12-Analogue

1981 ◽  
Vol 36 (7-8) ◽  
pp. 506-515 ◽  
Author(s):  
Jürgen Kopf ◽  
Klaus von Deuten ◽  
Rainer Bieganowski ◽  
Wilhelm Friedrich
Keyword(s):  
Crystal Structure ◽  
Vitamin B12 ◽  
Structure Analysis ◽  
Crystal And Molecular Structure ◽  
Heavy Atom ◽  
Crystal Structure Analysis ◽  
Purine Base ◽  
X Ray ◽  
Heavy Atom Method ◽  
Counter Data

Abstract Vitamin B12-factor A (2-Methyladeninyl-cyanocobamide), Vitamin B12, X-Ray Crystal Structure Analysis The crystal and molecular structure of 2-methyladeninyl-cyanocobamide (factor A) has been determined. This compound crystallizes in space group P21212, with a = 2630.6 (15), b = 2210.6 (13) and c = 1592.1 (9) pm. The structure has been solved by the heavy-atom method and refined by least-squares methods on the basis of 3682 X-ray counter data to R = 0.166 and R w = 0.148. As far as we know, this is the first X-ray-investigation of a purine-corrinoid, which differs from cyanocobalamin (vitamin B12) by containing a purine base instead of 5,6-dimethylbenz-imidazole. The structure analysis of 2-methyladeninyl-cyanocobamide shows unambiguously, that the purine base coordinates with cobalt via N B9. The choice of N B9 as coordinative atom can be ascribed partly (or mainly?) to steric influences, since coordination via N B3, which was also discussed, would presumably lead to severe distortion of the nucleotide loop.

scholarly journals Photochemical syntheses. XI. X-Ray analysis and molecular structure of 1,8-Diphenyl-1a,2,7,7a-tetrahydro-1,2,7-metheno-1H cyclopropa[b]naphthalene, a naphthalene-diphenylacetylene photoadduct

1976 ◽  
Vol 29 (8) ◽  
pp. 1851 ◽  
Author(s):  
C Kowala ◽  
BJ Poppleton ◽  
WHF Sasse
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Structure Analysis ◽  
Title Compound ◽  
Crystal Structure Analysis ◽  
X Ray

The structure of the title compound(1) has been confirmed by X-ray crystal structure analysis.

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