Carbon-phosphorus heterocycles. Synthesis of phosphorus-containing cannabinoid precursors and a single-crystal analysis of 1,2,3,4-tetrahydro-10-hydroxy-8-n-pentyl-5H-phosphorino[3,4-c][1]benzopyran-5-one 3-oxide

1981 ◽  
Vol 103 (8) ◽  
pp. 2032-2036 ◽  
Author(s):  
Jang. B. Rampal ◽  
K. Darrell Berlin ◽  
Nantelle S. Pantaleo ◽  
Ann McGuffy ◽  
Dick Van der Helm
Keyword(s):  
Single Crystal ◽  
Phosphorus Containing ◽  
Phosphorus Heterocycles ◽  
Single Crystal Analysis

Unusual Melting Trend in an Alkali Asymmetric Sulfonamide Salt Series: Single-Crystal Analysis and Modeling

2021 ◽  
Vol 60 (19) ◽  
pp. 14679-14686
Author(s):  
Luke Schkeryantz ◽  
Phu Nguyen ◽  
William D. McCulloch ◽  
Curtis E. Moore ◽  
Kah Chun Lau ◽  
...  
Keyword(s):  
Single Crystal ◽  
Single Crystal Analysis

Co-crystallisation of Lamotrigine with diprotic acids: synthesis, single crystal analysis, and in-vitro evaluation

2019 ◽  
Vol 14 ◽  
pp. 504-513
Author(s):  
Praveen Chappa ◽  
Arthanareeswari Maruthapillai ◽  
M. Tamilselvi ◽  
S. Devikala ◽  
J. Arockia Selvi
Keyword(s):  
Single Crystal ◽  
In Vitro Evaluation ◽  
Single Crystal Analysis

DFT and single crystal analysis of the pyrimethamine-based novel co-crystal salt: 2,4-diamino-5-(4-chloro-phenyl)-6-ethylpyrimidin-1-ium:4-hydroxybenzoate:methanol:hydrate (1:1:1:1) (DEHMH)

2020 ◽  
Vol 1199 ◽  
pp. 127041 ◽  
Author(s):  
Muhammad Ashfaq ◽  
Muhammad Nawaz Tahir ◽  
Aleksey Kuznetsov ◽  
Shafaat Hussain Mirza ◽  
Muhammad Khalid ◽  
...  
Keyword(s):  
Single Crystal ◽  
Single Crystal Analysis

The modulated structure of the calcium aluminate Ca6(AlO2)12·Bi2O3

2010 ◽  
Vol 66 (6) ◽  
pp. 585-593 ◽  
Author(s):  
O. Pérez ◽  
S. Malo ◽  
M. Hervieu
Keyword(s):  
Single Crystal ◽  
Calcium Aluminate ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
Electron Pairs ◽  
Modulated Structure ◽  
X Ray ◽  
Trigonal Bipyramidal ◽  
Superspace Formalism ◽  
Single Crystal Analysis

Bismuth calcium aluminate, Bi2Ca6Al12O27, has been prepared as a ceramic and a single crystal. Analysis of reciprocal space using both electron and X-ray diffraction show an R-centred hexagonal unit cell: a = b = 17.3892 (4), c = 6.986 (1) Å. Additional weak reflections are observed; they require the introduction of a modulation wavevector q = 0.0453 (2)c* for indexing. The modulated structure has been solved using the superspace formalism [superspace group X\overline{3}(00\gamma)0]. A framework of corner-sharing AlO4 tetrahedra forms corrugated sixfold rings and uncommon triple rings. The Ca2+ cations exhibit an eightfold coordination sphere; edge-sharing CaO8 polyhedra form intertwinned zigzagging rows along c creating a three-dimensional net. Bi atoms are located in large hexagonal tunnels parallel to c and form Bi2O3 pairs, which adopt a trigonal bipyramidal configuration. The 6s 2 lone-electron pairs (Lp) point along c, in the opposite direction to the three Bi—O strong bonds to form two BiO3Lp tetrahedra with a common base. Different orientations of the Bi2O3Lp2 pairs, rotated by 60° around c, are observed. Their stacking modes in each of the hexagonal tunnels are described. The sequence of the stacking varies along c in each of the tunnels.

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