Levocetirizinium dipicrate.

ABSTRACT: There are two cation-dianion pairs in the asymmetric unit of the title compound, C(21)H(27)ClN(2)O(3) (2+)·2C(6)H(2)N(3)O(7) (-) {systematic name: 1-[2-(carb-oxy-meth-oxy)eth-yl]-4-[(R)-(4-chloro-phen-yl)phenyl-meth-yl]piperazine-1,4-diium bis-(2,4,6-trinitro-phenol-ate)}. 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 inter-acts 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 inter-molecular N-H?O and strong O-H?O hydrogen bonds, and weak ?-ring and ?-? stacking inter-actions [centroid-centroid distance = 3.7419?(14)?Å] dominate the crystal packing, creating a three-dimensional supra-molecular structure.

SUBMITTER: Jasinski JP 

PROVIDER: S-EPMC3011381 | biostudies-other | 2010

REPOSITORIES: biostudies-other