title: Crystal structure of bis-(μ-4-nitro-benzoato-κ2O:O')bis-[bis-(4-methyl-pyridine-κN)(4-nitro-benzoato-κ2O,O')manganese(II)].
abstract: The title compound, [Mn2(C7H4NO4)4(C6H7N)4] or [Mn2(μ-NBz)2(κ2-NBz)2(4-Mepy)4], where NBz is 4-nitro-benzoate and 4-Mepy is 4-methyl-pyridine, is a centrosymmetric dinuclear complex in which the MnIIatoms are bridged by two NBz ligands with Mn⋯Mn = 4.1324 (4) Å. The MnIIatom in this dimeric species is present in a distorted octa-hedral environment with the four coordinating O atoms forming the equatorial plane and the two pyridyl N atoms occupying the axial sites. An important structural feature of the dimeric complex is that each of the bridging carboxyl-ate ligands binds to the metal ions in an asymmetric fashion involving bent and linear Mn-O-C units. The crystal packing is consolidated by C-H⋯O and C-H⋯π interactions.
authors.affiliation: Department of Chemistry, Gauhati University, Guwahati 781 014, India.
authors.forename: Sourav J
authors.initials: SJ
authors.lastname: Bharali
authors.affiliation: Department of Chemistry, Pandu College, Guwahati 781 012, India.
authors.forename: Sanchay J
authors.initials: SJ
authors.lastname: Bora
authors.affiliation: Department of Chemistry, Gauhati University, Guwahati 781 014, India.
authors.forename: Birinchi K
authors.initials: BK
authors.lastname: Das
keywords: MnII tetra­carboxyl­ate dimer; asymmetric carboxyl­ate bridge; crystal structure; manganese 4-nitro­benzoate