Crystals of the title compound, C11H18N2O2·HBr, are monoclinic, space group P21, with a=7.339(3), b=13.246(7), c=7.340(4) Å, β=116.94(5)°, and Z=2. The structure was solved by direct methods and refined by full matrix least-squares calculations to an R value of 0.046 for 1218 observed reflections. The piperidine ring, in a chair conformation, is perpendicular (90.6°) to the strictly planar pyrrolidine-2,5-dione ring. Br− is hydrogen bonded to the positively charged piperidine N1 atom. Bond lengths and valence angles are comparable to those of various related compounds.
Structure of 2-ethyl-8-methyl-2,8-diazaspiro[4,5]decane-1,3-dione hydrobromide (RS-86)
BANDOLI, GIULIANO;DOLMELLA, ALESSANDRO;NICOLINI, MARINO;
1988
Abstract
Crystals of the title compound, C11H18N2O2·HBr, are monoclinic, space group P21, with a=7.339(3), b=13.246(7), c=7.340(4) Å, β=116.94(5)°, and Z=2. The structure was solved by direct methods and refined by full matrix least-squares calculations to an R value of 0.046 for 1218 observed reflections. The piperidine ring, in a chair conformation, is perpendicular (90.6°) to the strictly planar pyrrolidine-2,5-dione ring. Br− is hydrogen bonded to the positively charged piperidine N1 atom. Bond lengths and valence angles are comparable to those of various related compounds.
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