Table of Contents
Journal of Crystallography
Volume 2014, Article ID 914504, 8 pages
http://dx.doi.org/10.1155/2014/914504
Research Article

Synthesis and X-Ray Crystal Structure of Two Acridinedione Derivatives

1X-Ray Crystallography Laboratory, Post-Graduate Department of Physics & Electronics, University of Jammu, Jammu Tawi 180 006, India
2Department of Chemistry, Shivaji University, Kolhapur 416 004, India

Received 23 August 2013; Revised 27 December 2013; Accepted 13 January 2014; Published 27 February 2014

Academic Editor: Miao Du

Copyright © 2014 Dalbir Kour et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The two acridinedione derivatives 1 [3,3,6,6-tetramethyl-9-(4-methoxyphenyl)-3,4,6,7,9,10-hexahydro-2H,5H-acridine-1,8-dione (C24H29NO3)] and 2 [3,3,6,6-tetramethyl-9-(4-methylphenyl)-3,4,6,7,9,10-hexa-hydro-2H,5H-acridine-1,8-dione (C24H29NO2)] were synthesized and their crystal structures were determined by direct methods. The asymmetric unit of compound 1 contains two independent molecules. The 1,4-dihydropyridine (DHP) ring adopts boat conformation in both 1 and 2. In 1 the dione rings exist in sofa conformation (for both the crystallographically independent molecules) while the corresponding rings in 2 adopt half chair and sofa conformations, respectively. The crystal packing is stabilized by intermolecular N–HO and C–HO interactions in compound 1 and N–HO interactions in compound 2.