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Synthesis and Properties of Brominated 6,6′‐Dimethyl‐[2,2′‐bi‐1 H ‐indene]‐3,3′‐diethyl‐3,3′‐dihydroxy‐1,1′‐diones
Author(s) -
Chen Yong,
Pang Meili,
Cheng Kaige,
Wang Ying,
Han Jie,
Meng Jiben
Publication year - 2010
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201090215
Subject(s) - indene , chemistry , photochromism , medicinal chemistry , crystal structure , benzene , crystal (programming language) , photochemistry , organic chemistry , computer science , programming language
Photochromic 6‐bromomethyl‐6′‐methyl‐[2,2′‐bi‐1 H ‐indene]‐3,3′‐diethyl‐3,3′‐dihydroxy‐1,1′‐dione ( 2 ), 6,6′‐ bis(bromomethyl)‐[2,2′‐bi‐1 H ‐indene]‐3,3′‐diethyl‐3,3′‐dihydroxy‐1,1′‐dione ( 3 ) and 6,6′‐bis(dibromomethyl)‐[2,2′‐ bi‐1 H ‐indene]‐3,3′‐diethyl‐3,3′‐dihydroxy‐1,1′‐dione ( 4 ) have been synthesized from 6,6′‐dimethyl‐[2,2′‐bi‐1 H ‐ indene]‐3,3′‐diethyl‐3,3′‐dihydroxy‐1,1′‐dione ( 1 ). The single crystal of 4 was obtained and its crystal structure was analyzed. The results indicate that in crystal 4 , molecular arrangement is defective tightness compared with its precursor 1 . Besides, UV‐Vis absorption spectra in CH 2 Cl 2 solution, photochromic and photomagnetic properties in solid state of 2 , 3 and 4 were also investigated. The results demonstrate that when the hydrogen atoms in the methyl group on the benzene rings of biindenylidenedione were substituted by bromines, its properties could be affected considerably.