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  3. STRUCTURE OF DIMETHYL 9-METHYL-9,10-DIHYDRO-9,10-ETHENOANTHRACENE-11,12-DICARBOXYLATE

STRUCTURE OF DIMETHYL 9-METHYL-9,10-DIHYDRO-9,10-ETHENOANTHRACENE-11,12-DICARBOXYLATE

TitleSTRUCTURE OF DIMETHYL 9-METHYL-9,10-DIHYDRO-9,10-ETHENOANTHRACENE-11,12-DICARBOXYLATE
Publication TypeJournal Article
Year of Publication1993
AuthorsPokkuluri, PR, Trotter, J
JournalActa Crystallographica Section C-Crystal Structure Communications
Volume49
Pagination971-973
Date PublishedMay
Type of ArticleArticle
ISBN Number0108-2701
Abstract

There are two molecules per asymmetric unit and the two ester groups have different orientations m each of them; the C=C-C=O torsion angles are 1.9 and 2.4(6)degrees for the groups remote from and 91.7 and -91.4(5)degrees for the groups adjacent to the 9-Me substituents. The remote ester groups are therefore fully conjugated with the C=C double bond [cos2(angle) = 1.0] and the adjacent groups non-conjugated [cos2(angle) = 0], presumably as a result of steric effects as in the 9-chloro derivative.
URL<Go to ISI>://A1993LN00600047