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- W2022489813 abstract "The title solvates, (I) and (II), both C 18 H 16 N 6 O 3 ·C 2 H 6 OS, are isomeric. The conformations adopted by the 6-substituent are significantly different, with the 6-aminophenyl unit remote from the nitrophenyl ring in methoxypyrimidine (I) but adjacent to it in pyrimidinone (II). Pairs of pyrimidine molecules in (I) are linked by N—H...N hydrogen bonds to form cyclic centrosymmetric dimers from which the dimethyl sulfoxide molecules are pendent, while in (II) a combination of three independent N—H...O hydrogen bonds links the components into a chain containing both R 2 2 (8) and R 4 2 (8) rings, in which the dimethyl sulfoxide component acts as a double acceptor of hydrogen bonds. The significance of this study lies in its observation of different conformations for the pyrimidine components in (I) and (II), and different hydrogen-bonded structures, apparently dominated by the different roles adopted by the dimethyl sulfoxide components." @default.
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- W2022489813 date "2009-02-25" @default.
- W2022489813 modified "2023-09-27" @default.
- W2022489813 title "Different hydrogen-bonded structures in the isomeric solvates 2-amino-6-anilino-4-methoxy-5-[(<i>E</i>)-4-nitrobenzylideneamino]pyrimidine dimethyl sulfoxide solvate and 2-amino-6-[methyl(phenyl)amino]-5-[(<i>E</i>)-4-nitrobenzylideneamino]pyrimidin-4(3<i>H</i>)-one dimethyl sulfoxide solvate" @default.
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- W2022489813 doi "https://doi.org/10.1107/s0108270109004181" @default.
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