结构化学
結構化學
결구화학
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
2003年
6期
653-656
,共4页
胡惟孝%徐端钧%周卫%孙雅泉
鬍惟孝%徐耑鈞%週衛%孫雅泉
호유효%서단균%주위%손아천
anthrone%10-(2'%5'-dimethoxybenzylidene) anthrone%crystal structure%synthesis
The anthrone reacts with 2,5-dimethoxybenzaldehyde under base catalyst to afford the title compound (C23H18O3, Mr = 342.37). The crystal belongs to monoclinic, space group P21/c with a = 13.046(4), b = 8.937(2), c = 15.549(4)(A°),β= 106.52(3)°, V = 1738.1(8)(A°)3, Z = 4, Dc = 1.308 g/cm3,μ= 0.086 mm-1 and F(000) = 720. The final R = 0.0331 and wR = 0.0850. The results show that the two phenyl rings of the anthrone fragment are not coplanar, but with a dihedral angle of 157.92°. The middle ring of the anthrone moiety appears asymmetric boat conformation, while the 2,5-dimethoxyphenyl ring is restricted rotation. Therefore they exist in two optically active forms which are symmetrical glidingly.
