2,3-BIS(DIPHENYLMETHYLENE)SUCCINIC ANHYDRIDE, (I), 2-(2-ADAMANTYLIDENE)-3-(9-FLUORENYLIDENE)SUCCINIC ANHYDRIDE, (II), AND ENYLIDENE)-3-(3,4,5-TRIMETHOXYBENZYLIDENE)SUCCINIC ANHYDRIDE, (III)

Authors
KAFTORY M GOLDBERG Y GOLDBERG S BOTOSHANSKY M
Citation
M. Kaftory et al., 2,3-BIS(DIPHENYLMETHYLENE)SUCCINIC ANHYDRIDE, (I), 2-(2-ADAMANTYLIDENE)-3-(9-FLUORENYLIDENE)SUCCINIC ANHYDRIDE, (II), AND ENYLIDENE)-3-(3,4,5-TRIMETHOXYBENZYLIDENE)SUCCINIC ANHYDRIDE, (III), Acta crystallographica. Section C, Crystal structure communications, 54, 1998, pp. 683-687
Citations number
20
Categorie Soggetti
Crystallography
Journal title
Acta crystallographica. Section C, Crystal structure communications → ACNP
ISSN journal
01082701
Volume
54
Year of publication
1998
Part
5
Pages
683 - 687
Database
ISI
SICI code
0108-2701(1998)54:<683:2A(2>2.0.ZU;2-7
Abstract
The title compounds are derivatives of dimethylene-succinic anhydride and belong to the fulgide family of compounds. The fulgides were the f irst photochromic systems to be discovered. Fulgide (I) (C30H20O3) pos sesses a crystallographic twofold axis. The divinyl-succinic anhydride moiety is not planar in fulgides (II) (C27H22O3) and (III) (C27H20O6) In both (II) and (III), the C atom bonded to the fluorenyl moiety dev iates significantly from the mean plane through the five-membered ring of the fluorenyl moiety.