title: Novel C-H···C contacts involving 3,5-dimethylpyrazole ligands in a tetracoordinate Co(II) complex.
abstract: A violet-blue cobalt(II) complex [Co(4-nbz)(2)(DMP)(2)] (1), where 4-nbz = 4-nitrobenzoate and DMP = 3,5-dimethylpyrazole, has been prepared at room temperature. Crystallographic studies on 1·0.5H(2)O reveal that the molecules of 1 are linked by a variety of non-covalent bonds including a novel type of C-H···C contact forming, with assistance from N-H···O, C-H···O and C-H···π interactions, an intricate 3-D supramolecular network. Theoretical calculations suggest that the observed C-H···C interactions are energetically quite significant.
authors.affiliation: Department of Chemistry, Gauhati University, Guwahati, 781 014, Assam, India.
authors.forename: Stutee
authors.initials: S
authors.lastname: Chakravorty
authors.forename: James A
authors.initials: JA
authors.lastname: Platts
authors.forename: Birinchi K
authors.initials: BK
authors.lastname: Das