A hydrogen-bonded ribbon in 6-amino-3-methyl-5-nitroso-2-(pyrrolidin-1-yl)pyrimidin-4(3<i>H</i>)-one monohydrate and hydrogen-bonded sheets in 6-amino-2-dimethylamino-3-methyl-5-nitrosopyrimidin-4(3<i>H</i>)-one monohydrate
作者:Fabían Orozco、Braulio Insuasty、Justo Cobo、Christopher Glidewell
DOI:10.1107/s0108270109039018
日期:2009.11.15
In each of 6-amino-3-methyl-5-nitroso-2-(pyrrolidin-1-yl)pyrimidin-4(3H)-one monohydrate, C9H13N5O2 center dot H2O, (I), and 6-amino-2-dimethylamino-3-methyl-5-nitrosopyrimidin-4(3H)-one monohydrate, C7H11N5O2 center dot(HO)-O-2, (II), the interatomic distances indicate significant polarization of the electronic structures of the pyrimidinone molecules. In each compound, the organic component contains an intramolecular N-H center dot center dot center dot O hydrogen bond. The molecular components in (I) are linked by a combination of two-centre O-H center dot center dot center dot O, O-H center dot center dot center dot N and N-H center dot center dot center dot O hydrogen bonds and a three-centre O-H center dot center dot center dot(NO) hydrogen bond to form a broad ribbon containing five distinct ring motifs. In compound (II), three intermolecular hydrogen bonds, one each of the O-H center dot center dot center dot O, O-H center dot center dot center dot N and N-H center dot center dot center dot O types, link the molecules into sheets containing equal numbers of centrosymmetric R-4(4)(10) and R-10(8)(34) rings.