Research Article: 9-(2-Chloro­benz­yloxy)-6,7-dihydro-2H-benzo[c][1,2,4]triazolo[4,3-a]azepin-3(5H)-one

Date Published: July 01, 2011

Publisher: International Union of Crystallography

Author(s): Da-Cheng Jin, Wen-Bin Zhang, Feng-Yu Piao, Rong-Bi Han.


In the title mol­ecule, C18H16ClN3O2, the seven-membered ring adopts an envelope conformation with the flap atom deviating by 0.801 (5) Å from the mean plane formed by the remaining non-H atoms. Inter­molecular N—H⋯O hydrogen bonds link the mol­ecules into centrosymmetric dimers. The crystal packing also exhibits weak inter­molecular C—H⋯N hydrogen bonds and π–π inter­actions with a short distance of 3.734 (3) Å between the centroids of the aromatic rings of neighbouring mol­ecules.

Partial Text

For background and details of the synthesis, see: Piao et al. (2011 ▶); Jin et al. (2006 ▶). For related structures, see: Han et al. (2010 ▶); Jin et al. (2010 ▶).




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