%0 Journal Article
%T 4-Cyano-N-ethylspiro[chromene-2,4¡ä-piperidine]-1¡ä-carboxamide
%A P. Rajalakshmi
%A N. Srinivasan
%A R. V. Krishnakumar
%J Acta Crystallographica Section E
%D 2013
%I International Union of Crystallography
%R 10.1107/s1600536812051124
%X The title compound, C17H19N3O2, crystallizes with two independent molecules (A and B) in the asymmetric unit. In both molecules, the pyran ring has a twisted conformation (5S4), with Q = 0.301 (3)  , ¦È = 116.7 (6) and  = 213.6 (7)¡ã for molecule A, and Q = 0.364 (2)  , ¦È = 113.7 (3) and   = 213.0 (4)¡ã for molecule B. In molecule B, the terminal ethyl group is disordered over two orientations with an occupancy ratio of 0.55 (1):0.45 (1). In the crystal, molecules A and B form very similar but separate R12(7) motifs through N¡ªH...O and C¡ªH...O hydrogen bonds. The resulting chains along [001] are interlinked by weaker C¡ªH...O and C¡ªH...¦Ð interactions, forming layers parallel to the bc plane.
%U http://scripts.iucr.org/cgi-bin/paper?S1600536812051124