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Synthesis and X-ray Structure Analysis of (Z)-1-(4-Bromophenyl)-1-phenyl-2-(4-tert-butylphenyl)ethene  

Kim, Chul-Bae (School of Chemical Engineering and Materials Science, Chung-Ang University)
Cho, Hyun-Jong (School of Chemical Engineering and Materials Science, Chung-Ang University)
Lee, Sung-Kyung (School of Chemical Engineering and Materials Science, Chung-Ang University)
Park, Kwangyong (School of Chemical Engineering and Materials Science, Chung-Ang University)
Publication Information
Applied Chemistry for Engineering / v.20, no.3, 2009 , pp. 335-338 More about this Journal
Abstract
As important intermediates for blue emitting materials of organic light-emitting diodes, bromotriphenylethylene derivatives for distrylarylenes are prepared by reactions of bromobenzophenone with benzylphosphonates. The reaction produces a 60 : 40 mixture of (Z)- and (E)-geometric isomers that are difficult to be resolved. The (Z)-isomer is successfully isolated by a selective recrystallization process using 2-propanol as a solvent. The X-ray structure analysis of (Z)-isomer shows that dihedral angles between tert-butylphenyl ring and bromophenyl ring and between bromophenyl ring and phenyl ring are $56.5(4)^{\circ}$ and $74.1(4)^{\circ}$, respectively.
Keywords
single crystal; X-ray structure analysis; triphenylethene; Horner-Wadsworth-Emmons;
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