Bis(2,4-diaminopyrimidinium) Sulfate Monohydrate, 2C4H7N4+.SO42−.H2O

A. C. Gomes,G. Biswas,S. Pain (Biswas),S. Ghosh,D. Ghosh,Y. Iitaka,A. Banerjee

Acta Crystallographica Section C-crystal Structure Communications（1996）

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摘要

The asymmetric unit of the crystal consists of one sulfate ion, one water molecule and two 2,4-diamino-pyrimidine (DAP) molecules slacked parallel to the b direction with average perpendicular separations of 3.310(4) and 3.343(4)Angstrom, respectively. The tilt angle between the least-squares planes of the. two DAP molecules in the asymmetric unit is 2.1(1)degrees. The structure is stabilized by stacking forces, N-H ... N hydrogen bonds and N-H ... O hydrogen bonds.

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