Subha V, Seethalakshmi T, Balakrishnan T, Judith Percino M, Venkatesan P. Crystal structure and Hirshfeld surface analysis of the hydrated 2:1 adduct of piperazine-1,4-diium 3,5-di-nitro-2-oxidobenzoate and piperazine.
Acta Crystallogr E Crystallogr Commun 2022;
78:198-202. [PMID:
35145750 PMCID:
PMC8819449 DOI:
10.1107/s2056989022000226]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 01/06/2022] [Indexed: 11/16/2022]
Abstract
The crystal structure of the adduct piperazine-1,4-diium 3,5-di-nitro-2-oxidobenzoate-piperazine-water (2/1/2) shows the existence of a 3,5-di-nitro-salicylate dianion (DNSA2-) and a protonated piperazine-1,4-diium cation (PIP2+) along with a piperazine mol-ecule. The formula of the title adduct in the asymmetric unit is 2C4H12N2 2+·2C7H2N2O7 2-·C4H10N2·2H2O with Z = 1. The piperazine ring in the piperazine-1,4-diium cation and in the neutral piperazine mol-ecule adopt chair conformations. All O atoms in the DNSA2- moiety and the water mol-ecule act as hydrogen-bonding acceptors for various inter-molecular O-H⋯O, N-H⋯O and C-H⋯O inter-actions, which stabilize the crystal structure. Various supra-molecular architectures formed by the different inter-molecular inter-actions are discussed. The relative contribution of various inter-molecular contacts is analysed with the aid of two-dimensional (full and decomposed) fingerprint plots, indicating that H⋯O/O⋯H (50.2%) and H⋯H (36.2%) contacts are the major contributors to the stabilization of the crystal structure.
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