title: Hydrogen bonding in the crystal structure of bis[3-([thiomethyl]methyl)pyrazole]copper(II) perchlorate.
abstract: The ability of a metal-coordinated pyrazole to engage in hydrogen bonding has been explored by synthesis of the title complex, bis[3-([thiomethyl]methyl)pyrazole]copper(II) perchlorate (3). The coordination in 3 can be described as pseudo-octahedral, with two relatively tightly-bound 3-[(thiomethyl)methyl]pyrazole ligands occupying the equatorial plane, forming a [CuN(2)S(2)](2+) unit with the S donors mutually trans to each other. The axial positions are each filled by a weakly bound perchlorate counterion, one oxygen of which forms a hydrogen bond with the pyrazole N-H moiety on an adjacent [CuN(2)S(2)](2+) unit.
authors.affiliation: Department of Chemistry, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-1030, USA. grotjahn@chemistry.sdsu.edu
authors.forename: D B
authors.initials: DB
authors.lastname: Grotjahn
authors.forename: S
authors.initials: S
authors.lastname: Van
authors.forename: D
authors.initials: D
authors.lastname: Combs
authors.forename: W S
authors.initials: WS
authors.lastname: Kassel
authors.forename: A L
authors.initials: AL
authors.lastname: Rheingold