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. 2012 Oct 1;68(Pt 10):o2839-40.
doi: 10.1107/S1600536812037245. Epub 2012 Sep 5.

5-(4-Fluoro-benzyl-idene)-4'-(4-fluoro-phen-yl)-1,1'-dimethyl-dispiro-[piperidine-3,3'-pyrrolidine-2',3''-indoline]-4,2''-dione

V Rajni Swamy  1 , S Ramaswamy, N Srinivasan, R Ranjith Kumar, R V Krishnakumar
Affiliations

5-(4-Fluoro-benzyl-idene)-4'-(4-fluoro-phen-yl)-1,1'-dimethyl-dispiro-[piperidine-3,3'-pyrrolidine-2',3''-indoline]-4,2''-dione

V Rajni Swamy et al. Acta Crystallogr Sect E Struct Rep Online. .

Abstract

The asymmetric unit of the title compound, C(30)H(27)F(2)N(3)O(2), contains two independent mol-ecules. The pyrrolidine five-membered ring assumes an envelope conformation (with the CH(2) atom at the flap) in one mol-ecule and a twisted conformation in the other one. In both independent mol-ecules, the 4-piperidinone rings adopt a similar twisted chair conformation. In the crystal, the two independent mol-ecules form an R(2) (2)(8) dimer through a pair of N-H⋯O hydrogen bonds; the R(2) (2)(8) dimers are connected via weak C-H⋯O hydrogen bonds, leading to a chain extending along the c axis.

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Figures

Fig. 1.
Fig. 1.
The molecular structure of (I), with atom labels and 30% probability displacement ellipsoids for non-H atoms.
Fig. 2.
Fig. 2.
Overlay diagram of the two molecules A and B in the asymmetric unit showing differences in their conformation.
Fig. 3.
Fig. 3.
R22(8) dimers connected through C—H···O hydrogen bond leading to a chain along the c-axis. Non-participating rings, methyl groups and F atoms are omitted for clarity.
Fig. 4.
Fig. 4.
The packing of (I), viewed down the c axis. Non-participating rings, methyl groups and F atoms are omitted for clarity.
See this image and copyright information in PMC

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