Research Information System
ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, vol.78, pp.709-737, 2022 (ESCI)
In this study, four new piperazinium salts, namely, 4-phenylpiperazin-1-ium 4-ethoxybenzoate monohydrate, C9H9O3 center dot C10H15N2 center dot H2O (I); 4-phenylpiperazin-1-ium 4-methoxybenzoate monohydrate, C10H15N2 center dot C8H7O3 center dot H2O (II); 4-phenylpiperazin-1-ium 4-methylbenzoate monohydrate, C10H15N2 center dot C8H7O2 center dot H2O (III); and 4-phenylpiperazin-1-ium trifluoroacetate 0.12 hydrate, C10H15N2 center dot C2F3O2 center dot 0.12H(2)O (IV), have been synthesized. The single-crystal structures of these compounds reveal that all of them crystallize in the triclinic P (1) over bar space group and the crystal packing of (I)-(III) is built up of ribbons formed by a combination of hydrogen bonds of type N-H center dot center dot center dot O, O-H center dot center dot center dot O and other weak interactions of type C-H center dot center dot center dot O and C-H center dot center dot center dot pi, leading to a three-dimensional network. In the crystal of (IV), the cations and the anions are connected by C-H center dot center dot center dot O, N-H center dot center dot center dot O and C-H center dot center dot center dot F hydrogen bonds and by C-H center dot center dot center dot pi interactions, forming sheets which in turn interact to maintain the crystal structure by linking through the oxygen atoms of water molecules and van der Waals interactions, giving the whole structure.