Abstract
There are two cation–dianion pairs in the asymmetric unit of the title compound, C21H27ClN2O3 2+·2C6H2N3O7 − {systematic name: 1-[2-(carboxymethoxy)ethyl]-4-[(R)-(4-chlorophenyl)phenylmethyl]piperazine-1,4-diium bis(2,4,6-trinitrophenolate)}. The piperazine group in the levocetirizinium cation is protonated at both N atoms. The acetyl end groups form R 2 2(8) hydrogen-bonded motifs with adjacent cations. Each picrate anion interacts with the proponated N atom in the cation through a bifurcated N—H⋯O hydrogen bond, forming R 1 2(6) ring motifs. Strong and weak intermolecular N—H⋯O and strong O—H⋯O hydrogen bonds, and weak π–ring and π–π stacking interactions [centroid–centroid distance = 3.7419 (14) Å] dominate the crystal packing, creating a three-dimensional supramolecular structure.
Highlights
Refinement a bR. Rameshad c a Department of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA, bDepartment of Chemistry, Howard University, 525 College
There are two cation–dianion pairs in the asymmetric unit of the title compound, C21H27ClN2O32+2C6H2N3O7 {systematic name: 1-[2-(carboxymethoxy)ethyl]-4-[(R)-(4-chlorophenyl)phenylmethyl]piperazine-1,4-diium bis(2,4,6-trinitrophenolate)}
Cg5 is the centroid of the C6B–C11B ring
Summary
R. Rameshad c a Department of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA, bDepartment of Chemistry, Howard University, 525 College. Street NW, Washington, DC 20059, USA, cDepartment of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India, and dRL Fine Chem., Bangalore 560 064, India. Cg5 is the centroid of the C6B–C11B ring. There are two cation–dianion pairs in the asymmetric unit of the title compound, C21H27ClN2O32+2C6H2N3O7 {systematic name: 1-[2-(carboxymethoxy)ethyl]-4-[(R)-(4-chlorophenyl)phenylmethyl]piperazine-1,4-diium bis(2,4,6-trinitrophenolate)}. The piperazine group in the levocetirizinium cation is protonated at both N atoms. Each picrate anion interacts with the proponated N atom in the cation through a bifurcated N—H O hydrogen bond, forming. Strong and weak intermolecular N—H O and strong O—H O hydrogen bonds, and weak –ring and. 3.7419 (14) Å] dominate the crystal packing, creating a three-dimensional supramolecular structure
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