Crystal structure of trimethyl-[4-(2-oxopyrrolidin-1-yl)but-2-ynyl]ammonium iodide

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Abstract
The structure of the title compound has been determined by single-crystal X-ray diffraction. Crystals are triclinic with Z= 2 in a unit cell of dimensions a= 9·382(4), b= 7·502(3), c= 11·166(4)Å, α= 111·13(5), β= 69·89(5), γ= 93·23(5)°, space group P. The structure was solved by Patterson and Fourier methods and refined by least-squares to R 0·051 for 2501 observed three-dimensional diffractometer data. The amide group N(1), C(5), O(1), C(6) is planar and the orientation of the trimethylammonium group is symmetrical with respect to C(3)–C(4) such that τ[C(3)–C(4)–N(2)–C(10)] is almost 180°.

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