Bis(?-2-fluorobenzoato-1:2?2O:O?)(2-fluorobenzoato-1?2O,O?)(2-fluorobenzoato-2?O)dinicotinamide-1?N1,2?N1-dizinc(II)-2-fluorobenzoic acid (1/1)
Küçük Resim Yok
Tarih
2009
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Int Union Crystallography
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The asymmetric unit of the title compound, [Zn-2(C7H4FO2)(4)(C6H6N2O)(2)]center dot C7H5FO2, consists of a binuclear Zn-II complex bridged by two carboxyl groups of 2-fluorobenzoate (FB) anions and a 2-fluorobenzoic acid molecule. The two bridging FB anions, one chelating FB anion and one nicotinamide (NA) ligand coordinate to one Zn cation with a distorted square-pyramidal geometry, while the two bridging FB anions, one monodentate FB anion and one NA ligand coordinate to the other Zn cation with a distorted tetrahedral geometry. Within the binuclear molecule, the pyridine rings are oriented at a dihedral angle of 19.41 (14)degrees. In the crystal structure, the uncoordinated 2-fluorobenzoic acid molecules are linked by O-H center dot center dot center dot O hydrogen bonding, forming centrosymmetric supramolecular dimers. Intermolecular N-H center dot center dot center dot O hydrogen bonds link the complex molecules into a three-dimensional network. The pi-pi contacts between nearly parallel pyridine and benzene rings [dihedral angles of 19.41 (14) and 12.72 (16)degrees, respectively, centroid-centroid distances = 3.701 (2) and 3.857 (3) angstrom] may further stabilize the crystal structure. The fluorine atoms in two FB ligands are disordered over two positions, with occupancy ratios of 0.70:0.30.
Açıklama
Anahtar Kelimeler
Kaynak
Acta Crystallographica Section E-Crystallographic Communications
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
65
