title: Crystal structure of 4-[4-(eth-oxy-carbon-yl)piperazin-1-yl]benzoic acid.
abstract: The asymmetric unit of the title compound, C14H18N2O4, contains two independent mol-ecules (AandB) which have essentially the same conformation. The piperazine rings adopts chair conformations with the N atoms out of plane. The dihedral angles formed by the four approximately planar C atoms of the piperazine ring and the benzene ring is 30.8 (5)° in mol-eculeAand 30.6 (5)° in mol-eculeB. In the crystal, mol-eculesAandBare connected by a pair of O-H⋯O hydrogen bonds, forming a dimer with graph-set notationR22(8). Weak C-H⋯O hydrogen bonds connect the dimers, forming zigzag chains along [001].
authors.affiliation: Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP 208 016, India.
authors.forename: Md Serajul Haque
authors.initials: MS
authors.lastname: Faizi
authors.affiliation: Department of Applied Chemistry, Aligarh Muslim University, Aligarh 202 002, India.
authors.forename: Musheer
authors.initials: M
authors.lastname: Ahmad
authors.affiliation: Department of Chemistry, Taras Shevchenko National University of Kyiv, 64 Vladimirska Str., Kiev 01601, Ukraine.
authors.forename: Irina A
authors.initials: IA
authors.lastname: Golenya
keywords: 4-fluoro­benzoic acid; carb­oxy­lic acids; crystal structure; ethyl 1-piperazine­carboxyl­ate; hydrogen bonds; piperazine