Abstract

The design of multicomponent crystals offers a means to modify the physicochemical properties of crystals without altering the chemical properties of a particular molecule. In this study, a multicomponent crystal, the salt of malonic acid with p-chloroaniline, was synthetized and structurally characterized. The title compound wasprepared by grinding in an agate mortar, and its structure was studied by powder and single-crystal X-ray diffraction. This compound crystallize in the monoclinic system with space group P21/c, Z=4, and unit cell parameters a = 12.9776(7)Å, b = 9.2308(5)Å, c = 8.5170(5)Å,  = 93.474(3)°. The multicomponent compound, p-chloroanilinium semi-malonate, can be described as an ionic ensemble assisted by hydrogen bonds established between p-chloroanilinium cations and semi-malonate anions. The molecular structure and crystal packing are stabilized mainly by intermolecular O--H•••O and N--H•••O hydrogen bonds interactions. The molecules construct a supramolecular assembly with a two-dimensional hydrogen bonded network along the ca plane.

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