Relationship Between Physical Properties and Crystal Structures of Chiral Drugs

1997 ◽  
Vol 86 (10) ◽  
pp. 1073-1078 ◽  
Author(s):  
Z. Jane Li ◽  
David J.W. Grant
Keyword(s):  
Physical Properties ◽  
Crystal Structures ◽  
Chiral Drugs

scholarly journals Crystal-to-Crystal Transformation from K2[Co(C2O4)2(H2O)2]·4H2O to K2[Co(μ-C2O4)(C2O4)]

2021 ◽  
Vol 7 (6) ◽  
pp. 77
Author(s):  
Bin Zhang ◽  
Yan Zhang ◽  
Guangcai Chang ◽  
Zheming Wang ◽  
Daoben Zhu
Keyword(s):  
Hydrogen Bond ◽  
Physical Properties ◽  
Crystal Structures ◽  
Molecular Crystal ◽  
Trigonal Prism ◽  
Space Group ◽  
Cell Parameters ◽  
Oxalate Anion ◽  
Crystal Transformation ◽  
Antiferromagnetic Ordering

Crystal-to-crystal transformation is a path to obtain crystals with different crystal structures and physical properties. K2[Co(C2O4)2(H2O)2]·4H2O (1) is obtained from K2C2O4·2H2O, CoCl2·6H2O in H2O with a yield of 60%. It is crystallized in the triclinic with space group P1 and cell parameters: a = 7.684(1) Å, b = 9.011(1) Å, c = 10.874(1) Å, α = 72.151(2)°, β = 70.278(2)°, γ = 80.430(2)°, V = 670.0(1) Å3, Z = 2 at 100 K. 1 is composed of K+, mononuclear anion [Co(C2O4)2(H2O)22−] and H2O. Co2+ is coordinated by two bidentated oxalate anion and two H2O in an octahedron environment. There is a hydrogen bond between mononuclear anion [Co(C2O4)2(H2O)22−] and H2O. K2[Co(μ-C2O4)(C2O4)] (2) is obtained from 1 by dehydration. The cell parameters of 2 are a = 8.460(5) Å, b = 6.906 (4) Å, c = 14.657(8) Å, β = 93.11(1)°, V = 855.0(8) Å3 at 100 K, with space group in P2/c. It is composed of K+ and zigzag [Co(μ-C2O4)(C2O42−]n chain. Co2+ is coordinated by two bisbendentate oxalate and one bidentated oxalate anion in trigonal-prism. 1 is an antiferromagnetic molecular crystal. The antiferromagnetic ordering at 8.2 K is observed in 2.

scholarly journals PHYSICAL PROPERTIES AND CRYSTAL STRUCTURES OF POLY (META, PARA-XYLYLENE ADIPAMIDE) COPOLYMER

1973 ◽  
Vol 29 (9) ◽  
pp. T392-T404
Author(s):  
Youichi Kawaguchi ◽  
Masayoshi Shimada ◽  
Fumihide Fujimoto
Keyword(s):  
Physical Properties ◽  
Crystal Structures

Syntheses, crystal structures and physical properties of three new chalcogenides: NaGaGe3Se8, K3Ga3Ge7S20, and K3Ga3Ge7Se20

2016 ◽  
Vol 45 (2) ◽  
pp. 532-538 ◽  
Author(s):  
Xiaoshuang Li ◽  
Chao Li ◽  
Pifu Gong ◽  
Zheshuai Lin ◽  
Jiyong Yao ◽  
...  
Keyword(s):  
Physical Properties ◽  
Crystal Structures ◽  
Layered Structure

NaGaGe3Se8 has a layered structure, while K3Ga3Ge7Q20 (Q = S, Se) are constructed by incompletely isolated quasi-2D layers, leading to large channels loosely occupied by K+ cations.

Preparation, crystal structures, EHT band calculations and physical properties of κ-(EDS-EDT-TTF)2[Ag2(CN)3] and α-(BETS)2Ag(CN)2

1999 ◽  
Vol 9 (2) ◽  
pp. 387-393 ◽  
Author(s):  
Stéphane Golhen ◽  
Lahcène Ouahab ◽  
Albert Lebeuze ◽  
Mounir Bouayed ◽  
Pierre Delhaes ◽  
...  
Keyword(s):  
Physical Properties ◽  
Crystal Structures

Tetracyanoanthraquinodimethanes Having Biaryl Substituents: Synthesis, Crystal Structures, and Physical Properties

2012 ◽  
Vol 41 (5) ◽  
pp. 482-484 ◽  
Author(s):  
Hiroshi Chiba ◽  
Jun-ichi Nishida ◽  
Yoshiro Yamashita
Keyword(s):  
Physical Properties ◽  
Crystal Structures
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