(Z)-1-(4-브로모페닐)-1-페닐-2-(4-tert-부틸페닐)에텐의 합성 및 X-선 구조분석

초록

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)° and 74.1(4)°, respectively.

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