Crystal and molecular structure of [(4-picolineN-oxide)2H]+ [AuCl4]?: A diadduct revealing a short hydrogen bond

1986 ◽  
Vol 16 (5) ◽  
pp. 647-656 ◽  
Author(s):  
M. Sakhawat Hussain ◽  
Saud A. Aziz Al-Hamoud
Keyword(s):  
Molecular Structure ◽  
Hydrogen Bond ◽  
Crystal And Molecular Structure ◽  
Short Hydrogen Bond

Crystal and Molecular Structure of Lithium Benzohydroxamate-Benzohydroxamic Acid (1 : 1) Adduct

1996 ◽  
Vol 61 (1) ◽  
pp. 139-146 ◽  
Author(s):  
Roman Řeřicha ◽  
Ivana Císařová ◽  
Jaroslav Podlaha
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Hydrogen Bond ◽  
Crystal And Molecular Structure ◽  
Molecular Geometry ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Benzohydroxamic Acid ◽  
Short Hydrogen Bond

The crystal structure of the title compound was determined by single crystal X-ray diffraction. It consists of molecules of benzohydroxamic acid, its O-deprotonated anions and lithium cations in the 1 : 1 : 1 molar ratio. Although the molecular geometry of the anion is very similar to that of the acid, these units can be unambiguously distinguished since the short hydrogen bond between the OH group of the acid and the N-bonded oxygen atom of the anion is remarkably asymmetric. This bond, together with the lithium cations (being surrounded by five oxygens), links the units into chains running in the crystallographic ab plane. The coordination polyhedron around Li represents a rare example of an almost undistorted LiO5 square pyramidal arrangement.

The influence of halide anions on the molecular structure of bis(N-methylpiperidine betaine) monocation with short hydrogen bond

2005 ◽  
Vol 741 (1-3) ◽  
pp. 171-181 ◽  
Author(s):  
M. Szafran ◽  
Z. Dega-Szafran ◽  
M. Jaskolski ◽  
A. Addlagatta ◽  
E. Dulewicz
Keyword(s):  
Molecular Structure ◽  
Hydrogen Bond ◽  
Halide Anions ◽  
Short Hydrogen Bond

The Crystal and Molecular Structure of Butorphanol Hydrogen Tartrate

1994 ◽  
Vol 59 (6) ◽  
pp. 1361-1367 ◽  
Author(s):  
Alexandr Jegorov ◽  
Roman Sobotík ◽  
Svetlana Pakhomova ◽  
Jan Ondráček ◽  
Jiří Novotný ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Crystal And Molecular Structure ◽  
Direct Methods ◽  
Chair Conformation ◽  
Triclinic Space Group ◽  
Space Group

The structure of butorphanol hydrogen tartrate {(9R,13S,14S)-(-)-17-(cyclobutylmethyl)morphinan-3,14-diol (2S,3S)-(-)-hydrogen tartrate} (C21H29NO2 .C4H6O6) was solved by direct methods and refined anisotropically to the R value of 0.029 for 2 069 observed reflections. The title morphine analogue crystallizes in the triclinic space group P1 with lattice parameters a = 7.620(1), b = 9.140(1), c = 9.591(1) Å, α = 105.48(1), β = 112.91(1), γ = 84.29(1)°, Z = 1. The butorphanol B ring possesses the 3E envelope conformation with small 3H2 distortion, C and D rings have a regular chair conformation. The intramolecular N17-H17...O2 hydrogen bond is observed in crystal structure of the title compound. The butorphanol and hydrogen tartrate molecules are joined together by means of O2-H(O2)...O7, O1-H(O1)...O7' and O3-H(O3)...O8" hydrogen bonds to form networks.

scholarly journals Sila-Pharmaka, 14. Mitt. Darstellung und Eigenschaften sowie Kristall-und Molekülstruktur von Sila-Difenidol /Sila-Drugs, 14th Communication Preparation and Properties as well as Crystal and Molecular Structure of Sila-Difenidol

1979 ◽  
Vol 34 (9) ◽  
pp. 1279-1285 ◽  
Author(s):  
R. Tacke ◽  
M. Strecker ◽  
W. S. Sheldrick ◽  
E. Heeg ◽  
B. Berndt ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Hydrogen Bond ◽  
Mass Spectroscopy ◽  
Crystal And Molecular Structure ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
H Nmr ◽  
Physical And Chemical ◽  
And Chemical Properties

Abstract Sila-difenidol (6b), a sila-analogue of the drug difenidol (6a), was synthesized according to Scheme 1. 6b and its new precursors 3 and 5 were characterized by their physical and chemical properties, and their structures confirmed by elementary analyses, 1H NMR and mass spectroscopy. 6 b crystallizes orthorhombic P212121 with a = 11.523(1), b = 14.366(4), c = 11.450(1) Å, Z = 4, Dber = 1.14 gcm-3. The structure was refined to R = 0.050 for 1897 reflexions. A strong nearly linear intramolecular O-H···N hydrogen bond of 2.685 Å is observed. The anticholinergic, histaminolytic and musculotropic spasmolytic activities of 6 a and 6 b are reported.

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