Abstract
In the title 2:1 co-crystal, 2C4H5ClN4·C4H6O4 the complete succinic acid mol-ecule is generated by a crystallographic centre of symmetry. In the crystal, pairwise O-H⋯N and N-H⋯O hydrogen bonds link the pyrimidine and succinic acid mol-ecules, generating R 2 2(8) loops. The pyrimidine mol-ecules are linked by pairwise N-H⋯N hydrogen bonds, again generating R 2 2(8) loops. Collectively, the hydrogen bonds link the components into corrugated (100) sheets. The Hirshfeld surface is presented.
Highlights
In the title 2:1 co-crystal, 2C4H5ClN4ÁC4H6O4 the complete succinic acid molecule is generated by a crystallographic centre of symmetry
The pyrimidine molecules are linked by pairwise N—HÁ Á ÁN hydrogen bonds, again generating R22(8) loops
The complete succinic acid molecule is generated by a crystallographic centre of symmetry (Fig. 1), with key torsion angles O1—C5—C6—C6i = À2.5 (3) and O2—C5— C6—C6i = 178.28 (18) [symmetry code: (i) 2 À x, 3 À y, 1 À z]
Summary
The crystal structures of various aminopyrimidine derivatives (Schwalbe & Williams, 1982; Edison et al, 2014; Thanigaimani et al, 2012) have been reported. The complete succinic acid molecule is generated by a crystallographic centre of symmetry (Fig. 1), with key torsion angles O1—C5—C6—C6i = À2.5 (3) and O2—C5— C6—C6i = 178.28 (18) [symmetry code: (i) 2 À x, 3 À y, 1 À z]. Pairwise O2—H2Á Á ÁN2 and N4—H4AÁÁO1 hydrogen bonds (for symmetry codes, see Table 1) link the pyrimidine and succinic acid molecules, generating R22(8) loops. The pyrimidine molecules are linked by pairwise N3—H3AÁ Á ÁN1i hydrogen bonds, again generating R22(8) loops. An N4— H4BÁ Á ÁO1ii hydrogen bond links the pyrimidine and succinic acid species.
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