Ring strain and the reactivity of dibenzophospholes and their quaternary salts: crystal and molecular structure of 5-(p-bromobenzyl)-5-phenyldibenzophospholium bromide

1978 ◽  
pp. 98 ◽  
Author(s):  
David W. Allen ◽  
Ian W. Nowell ◽  
A. Christopher Oades ◽  
Philip E. Walker
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Ring Strain ◽  
Quaternary Salts

The crystal and molecular structure of BNA, a cyclotetracondensate from quaternary salts of nicotinamide

1977 ◽  
Vol 33 (2) ◽  
pp. 494-500 ◽  
Author(s):  
M. Martínez-Ripoll ◽  
F. H. Cano ◽  
S. García-Blanco ◽  
S. Martínez-Carrera ◽  
W.-H. Gündel
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Quaternary Salts

Crystal and molecular structure of a platinum(II) complex with β-mercaptoethylamine hydrochloride

2018 ◽  
Vol 59 (1) ◽  
pp. 191-195
Author(s):  
A. N. Azizova ◽  
◽  
D. B. Tagiev ◽  
S. N. Osmanova ◽  
Sh. G. Kasumov ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure

The crystal and molecular structure of tris(pentamethylenedithiocarbamate) chromium(III)-chloroform (1 : 2)

1981 ◽  
Vol 46 (1) ◽  
pp. 6-19 ◽  
Author(s):  
Viktor Kettman ◽  
Ján Garaj ◽  
Jaroslav Majer
Keyword(s):  
Molecular Structure ◽  
Structural Analysis ◽  
Crystal And Molecular Structure ◽  
Analysis Method ◽  
Complex Molecules ◽  
Coordination Polyhedra ◽  
X Ray ◽  
Cell Dimensions ◽  
Crustal Density ◽  
Unit Cell Dimensions

The crystal and molecular structure of [Cr(S2CN(CH2)5)3].2 CHCl3 was found by the X-ray structural analysis method. The value R 0.090 was found for 1 131 observed independent reflections. The substance crystallizes in a space group of symmetry P212121 with the following unit cell dimensions: a = 0.8675 (6), b = 1.815(2), c = 2.155(3) nm. The experimentally observed crustal density was 1.48 Mgm-3 and the value calculated for Z = 4 was 1.51 Mgm-3. The CrS6 coordination polyhedron has the shape of a trigonally distorted octahedron, where the D3 symmetry is a approximately retained. The degree of trigonal distortion expressed as the projection of the chelate S-Cr-S angle onto the plane perpendicular to the C3 pseudo axis is Φ = 41.7° (Φ = 60° for an octahedron). The skeleton of the structure formed by the complex molecules contains channels filled with chloroform molecules. The specific type of complex-chloroform interaction consists of the formation of hydrogen bonds of the chloroform protons with the fully occupied pπ-orbitals of the sulphur atoms in the coordination polyhedra. The low stability and crystal decomposition can be explained by loss of chloroform from the channels.

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