title: A bis-acetonitrile two-coordinate copper(I) complex: synthesis and characterization of highly soluble B(C(6)F(5))(4)(-) salts of [Cu(MeCN)(2)](+) and [Cu(MeCN)(4)](+).
abstract: Copper(I)-acetonitrile complexes are exceedingly useful starting materials for the synthesis of copper(I) complexes with polydentate ligands. To extend the utility of such chemistry to solution studies in relatively low-dielectric solvents (i.e., diethyl ether, toluene) and to aid in obtaining products amenable to X-ray diffraction studies, we have recently begun to employ counteranions such as B(C(6)F(5))(4)(-) for bioinorganic studies. Thus, the synthesis of [Cu(MeCN)(4)]B(C(6)F(5))(4) (1) is presented. Its recrystallization from CH(2)Cl(2)/pentane yields the linear, two-coordinate complex [Cu(MeCN)(2)]B(C(6)F(5))(4) (2), whose centrosymmetric X-ray structure shows that its Cu-N distance is significantly shorter than that in other two-coordinate Cu(I) complexes with nitrogen ligands or that in the tetrahedral complex [Cu(MeCN)(4)]ClO(4). Infrared spectroscopy indicates interesting and diagnostically useful differences between the nu(CN) of 1 and 2.
authors.affiliation: Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, USA.
authors.forename: Hong-Chang
authors.initials: HC
authors.lastname: Liang
authors.forename: Eunsuk
authors.initials: E
authors.lastname: Kim
authors.forename: Christopher D
authors.initials: CD
authors.lastname: Incarvito
authors.forename: Arnold L
authors.initials: AL
authors.lastname: Rheingold
authors.forename: Kenneth D
authors.initials: KD
authors.lastname: Karlin
mesh_terms: D000097:Acetonitriles / Q000737:chemistry*; D001896:Boron Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006845:Hydrocarbons, Fluorinated / Q000737:chemistry*; D008024:Ligands; D008956:Models, Chemical; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D010084:Oxidation-Reduction; D012492:Salts / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000097:Acetonitriles; D001896:Boron Compounds; D006845:Hydrocarbons, Fluorinated; D008024:Ligands; D009942:Organometallic Compounds; D012492:Salts; D003300:Copper