2-[(2-Hy-droxy-benz-yl)amino]-pyrazinium perchlorate-2-[(pyrazin-2-yl-amino)-meth-yl]phenol (1/1).
In the crystal structure of the title co-crystal, C(11)H(12)N(3)O(+)·ClO(4) (-)·C(11)H(11)N(3)O, the perchlorate ion is disordered about a twofold rotation axis with the Cl atom located on the twofold rotation axis; the 2-[(2-hy-droxy-benz-yl)amino]-pyrazinium cation and the neutral 2-[(pyrazin-2-yl-amino)-meth-yl]phenol mol-ecule are disordered about the rotation axis in a 1:1 ratio. These two are connected by a pyrazine-pyrazine N(1)-H⋯N(4) hydrogen bond. The cation, whose two aromatic rings are twisted along the -CH(2)-NH- bond by 76.8 (1)°, is a hydrogen-bond donor to the perchlorate ion through the N atom of this link.
Shan
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Gao
Seik Weng
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