title: Crystal structure of di-chlorido-{2,6-bis-[(3-phenyl-1H-pyrazol-1-yl)meth-yl]pyridine}cobalt(II).
abstract: In the title complex, [CoCl2(C25H21N5)], the Co(II) atom is coordinated by two Cl atoms and two N atoms, provided by a tridentate pyrazolylpyridyl ligand, forming a slightly distorted tetra-hedral geometry [range of angles: 96.51 (10) (chelate ring) to 118.60 (9)°]. The dihedral angle between Cl/Co/Cl and N/Co/N planes is 86.83 (7)°. The chelate ring has the conformation of a distorted boat. The dihedral angle between pyridyl ring and the coordinated pyrazolyl ring is 56.16 (12)°. The uncoordinated pyrazolyl ring is almost perpendicular to the pyridyl ring with the dihedral angle of 87.49 (10)°. In the crystal packing, inter-molecular phenyl-C-H ⋯π(pyrid-yl) inter-actions generate dimeric aggregates. These are connected into a zigzag supra-molecular chain along the c-axis direction via π-π inter-actions [inter-centroid distance between pyridyl and phenyl rings = 3.664 (2) Å].
authors.affiliation: Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea.
authors.forename: Kyung-Sun
authors.initials: KS
authors.lastname: Son
authors.affiliation: Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea.
authors.forename: Jeong Oh
authors.initials: JO
authors.lastname: Woo
authors.affiliation: Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea.
authors.forename: Daeyoung
authors.initials: D
authors.lastname: Kim
authors.affiliation: Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea.
authors.forename: Sung Kwon
authors.initials: SK
authors.lastname: Kang
keywords: CoII complex; C—H ⋯π inter­actions; crystal structure; pyrazolylpyrid­yl; π–π inter­actions