Jump to ContentJump to Main Navigation
Show Summary Details

Zeitschrift für Kristallographie - Crystalline Materials

Editor-in-Chief: Pöttgen, Rainer

Ed. by Antipov, Evgeny / Bismayer, Ulrich / Boldyreva, Elena V. / Huppertz, Hubert / Petrícek, Václav / Tiekink, E. R. T.


IMPACT FACTOR increased in 2015: 2.560
Rank 8 out of 26 in category Cristallography in the 2015 Thomson Reuters Journal Citation Report/Science Edition

SCImago Journal Rank (SJR) 2015: 0.827
Source Normalized Impact per Paper (SNIP) 2015: 1.198
Impact per Publication (IPP) 2015: 1.834

249,00 € / $374.00 / £187.00*

Online
ISSN
2196-7105
See all formats and pricing

 


Select Volume and Issue
Loading journal volume and issue information...

30,00 € / $42.00 / £23.00

Get Access to Full Text

The crystal and molecular structure of echitamine iodide, C22H29O4N2I

H. Manohar / S. Ramaseshan

Citation Information: Zeitschrift für Kristallographie. Volume 117, Issue 4, Pages 273–292, ISSN (Online) 0044-2968, ISSN (Print) 1433-7266, DOI: 10.1524/zkri.1962.117.4.273, July 2010

Publication History

Published Online:
2010-07-28

Abstract

The paper reports the detailed x-ray analysis of the structure of echitamine iodide. This substance and the chloride which are isomorphous belong to the orthorhombic space group P212121 with four molecules in the unit cell. The axial dimensions of the iodide are a = 18.45 Å, b = 13.83 Å, c = 8.48 Å. The structure has been solved from the hk0, h0l and 0kl data by Fourier-projection methods, use being made of the ‘isomorphous replacement’ technique and the ‘heavy atom’ method to obtain the phases of the reflections. The final R index for 379 reflections of measurable intensity is 0.145. The molecular configuration of the quarternary echitamine ion has been established, and it has been shown that this dihydro-indole alkaloid is unique in having two five-membered rings fused to a ‘boat’-shaped substituted cyclohexane ring along a common bond. The positions of all the side-groups are well explained by postulating weak intramolecular hydrogen bonds.

Comments (0)

Please log in or register to comment.