The Alkaloids of Picrasma javanica: Further Studies

1990 ◽  
Vol 43 (2) ◽  
pp. 433 ◽  
Author(s):  
D Arbain ◽  
LT Byrne ◽  
MV Sargent ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Single Crystal ◽  
Structural Determination ◽  
X Ray

The structures of two β- carboline alkaloids previously isolated from Picrasma javanica Bl . ( Simarubaceae ) are revised to 1-ethenyl-4-methoxy-9H-pyrido[3,4-b]indol-8-ol (8-hydroxydehydrocrenatine) (5) and 1-ethyl-4-methoxy-9H-pyrido[3,4-b]indol-8-ol (8-hydroxycrenatine) (6), chiefly on the grounds of a single-crystal X-ray structural determination of the former compound.

scholarly journals Structural Determination of the Epitaxial C60 Overlayer on the Pentacene Single Crystal by Grazing Incidence X-ray Diffraction

Hyomen Kagaku ◽  
2016 ◽  
Vol 37 (9) ◽  
pp. 429-434 ◽  
Author(s):  
Ryohei TSURUTA ◽  
Yuta MIZUNO ◽  
Takuya HOSOKAI ◽  
Tomoyuki KOGANEZAWA ◽  
Hisao ISHII ◽  
...  
Keyword(s):  
Single Crystal ◽  
Grazing Incidence ◽  
Structural Determination ◽  
X Ray Diffraction ◽  
X Ray

Single crystal x-ray structural determination of natural products

2012 ◽  
Author(s):  
Hoong-Kun Fun ◽  
Nawong Boonnak ◽  
Suchada Chantrapromma
Keyword(s):  
Natural Products ◽  
Single Crystal ◽  
Structural Determination ◽  
X Ray

Addition of Adamantylidene to La2@C78:  Isolation and Single-Crystal X-ray Structural Determination of the Monoadducts

2008 ◽  
Vol 130 (3) ◽  
pp. 983-989 ◽  
Author(s):  
Baopeng Cao ◽  
Hidefumi Nikawa ◽  
Tsukasa Nakahodo ◽  
Takahiro Tsuchiya ◽  
Yutaka Maeda ◽  
...  
Keyword(s):  
Single Crystal ◽  
Structural Determination ◽  
X Ray

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

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.

Synthesis of 4-(3-coumarinyl)-3-benzyl-4-thiazolin-2-one 4-methylbenzylidenehydrazone and determination of the isomeric structure by X-ray analysis

2003 ◽  
Vol 218 (12) ◽  
Author(s):  
Süheyla Özbey ◽  
Nilgün Karalı ◽  
Aysel Gürsoy
Keyword(s):  
Single Crystal ◽  
Diffraction Analysis ◽  
Spectral Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Isomeric Structure ◽  
Elemental Analyses

AbstractIn this study 4-(3-coumarinyl)-3-benzyl-4-thi azolin-2-one 4-methylbenzylidenehydrazone 3 was synthesised. An independent proof of the thiazolylhydrazone structure of 3 was achieved by single crystal X-ray diffraction analysis. Elemental analyses and spectral data (IR,

The formation and structure of a 1,5-disubstituted S4N4 ring, (Ph3P=N)2S4N4, from the reaction of triphenylphosphine with tetrasulphur tetranitride

1979 ◽  
Vol 57 (23) ◽  
pp. 3171-3172 ◽  
Author(s):  
Josef Bojes ◽  
Tristram Chivers ◽  
Greg MacLean ◽  
Richard T. Oakley ◽  
A. Wallace Cordes
Keyword(s):  
Structural Determination ◽  
X Ray ◽  
Novel Products

Two novel products, (Ph3P=N)2S4N4 and (Ph3P=N)3S+S4N5−, have been isolated from the reaction of triphenylphosphine with S4N4; an X-ray structural determination of (Ph3P=N)2S4N4 shows it to consist of a 1,5-disubstituted S4N4 ring with the exocyclic substituents in an axial, equatorial configuration.

Lattice-constant and stress measurement in single crystals: a new method

2005 ◽  
Vol 38 (4) ◽  
pp. 678-684 ◽  
Author(s):  
Balder Ortner
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Lattice Constant ◽  
Stress Measurement ◽  
New Method ◽  
Lattice Plane ◽  
X Ray ◽  
Advantages And Disadvantages

A method for the X-ray determination of lattice-plane distances is given. Similar to Bond's method, it is based on the measurement of rocking curves, with some advantages and disadvantages compared with the former method. The new method is especially designed for single-crystal stress measurement. Its usefulness is demonstrated in two examples of lattice-constant and stress measurement.

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