Twelve-membered crown ethers: Crystal structures of benzo-12-crown-4 and naphtho-12-crown-4期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Twelve-membered crown ethers: Crystal structures of benzo-12-crown-4 and naphtho-12-crown-4

Authors:	Yurii A. Simonov Alexandr A. Dvorkin Marina S. Fonari Tadeush I. Malinowski Elżbieta Luboch Andrzej Cygan Jan F. Biernat Edward V. Ganin Yurii A. Popkov

Affiliation:	(1) Institute of Applied Physics of the Academy of Sciences of Moldova, 277028 Kishiniev, Moldova;(2) Faculty of Chemistry, Technical University of Gdask, 80-952 Gdask, Poland;(3) Bogarsky Physicochemical Institute of the Academy of Sciences of Ukraine, 270080 Odessa, Ukraine

Abstract:	The crystal structures of two 12-membered crown ethers, benzo-12-crown-4 (1) and naphtho-12-crown-4 (2), have been determined by X-ray analysis. Both structures are molecular. Compound1 is monoclonic,P2₁/b,a=8.466(3),b=8.019(3),c=33.590(10) Å, =90.99(3)^o. The unit cell contains two crystallographically independent molecules of1 with similar conformations. Compound2 is also monoclinic,P2₁/a,a=24.148(8),b=14.535(4),c=7.987(5) Å, =102.87(2)^o. Two independent molecules in the unit cell have significantly different conformations.Supplementary data relating to this publication have been deposited with the British Library as Supplementary Publication No. SUP 82145 (19 pages).

Keywords:	12-membered crown ethers crystal structure conformation peculiarities X-ray analysis CH...O contacts
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