Fun Hoong-Kun, Maneerat Wisanu, Laphookhieo Surat, Chantrapromma Suchada
Acta Crystallogr Sect E Struct Rep Online. 2009 Sep 19;65(Pt 10):o2497-8. doi: 10.1107/S1600536809036915.
THE TITLE COMPOUND [SYSTEMATIC NAME: 1-meth-oxy-2-(3-methyl-but-2-en-yl)-9H-carbazole-3-carbaldehyde], C(19)H(19)NO(2), is a natural carbazole which was isolated from the twigs of Clausena lansium. The carbazole ring system is essentially planar with a mean deviation of 0.0068 (10) Å. The aldehyde substituent is approximately co-planar with the attached benzene ring with a torsion angle of -8.58 (14)°, whereas the meth-oxy group is rotated out of the benzene plane with a torsion angle of -82.17 (11)°. The dihedral angle between the mean planes of the 3-methyl-2-butenyl group and the carbazole ring is 88.06 (5)°. An inter-molecular N-H⋯O inter-action connects the mol-ecules into a chain along the a axis. The crystal is further consolidated by a C-H⋯O hydrogen bond and two π-π inter-actions with centroid-centroid distances of 3.6592 (6) and 3.7440 (6) Å.
标题化合物[系统命名：1-甲氧基-2-(3-甲基丁-2-烯基)-9H-咔唑-3-甲醛]，C(19)H(19)NO(2)，是一种从黄皮树枝条中分离得到的天然咔唑。咔唑环系基本呈平面状，平均偏差为0.0068 (10) Å。醛基取代基与相连的苯环近似共平面，扭转角为-8.58 (14)°，而甲氧基则以-82.17 (11)°的扭转角旋转出苯平面。3-甲基-2-丁烯基平均平面与咔唑环平均平面之间的二面角为88.06 (5)°。分子间的N-H⋯O相互作用将分子沿a轴连接成链。晶体通过C-H⋯O氢键和两个π-π相互作用进一步巩固，质心-质心距离分别为3.6592 (6)和3.7440 (6) Å。
