title: Crystallographic coincidence of two bridging species in a dinuclear Co ethynyl-benzene complex.
abstract: In the title compound, trans,trans-[μ-(m-phenyl-ene)bis-(ethyne-1,2-di-yl)]bis-[chlorido(1,4,8,11-tetra-aza-cyclo-tetra-deca-ne)cobalt(III)]-trans,trans-[μ-(5-bromo-m-phenyl-ene)bis-(ethyne-1,2-di-yl)]bis-[chlorido(1,4,8,11-tetra-aza-cyclo-tetra-deca-ne)cobalt(III)]-tetra-phenyl-borate-acetone (0.88/0.12/2/4), [Co(2)(C(12)H(4))Cl(2)(C(10)H(24)N(4))(2)](0.88)[Co(2)(C(10)H(3)Br)Cl(2)(C(10)H(24)N(4))(2)](0.12)(C(24)H(20)B)(2)·4C(3)H(6)O, with the exception of the acetyl-ene and bromine groups, all atomic postitions are the same in the two compounds and are modeled at full occupancy. The Co(III) ions are six-coordinate with acetyl-ide and chloride ligands bound to the axial sites and the N atoms from the cyclam rings coordinated at the equatorial positions. N-H⋯O and N-H⋯Cl hydrogen-bonding interactions help to consolidate the crystal packing.
authors.affiliation: Department of Chemistry, Colorado State University, Fort Collins, CO 80523-1872, USA.
authors.forename: Wesley A
authors.initials: WA
authors.lastname: Hoffert
authors.forename: Matthew P
authors.initials: MP
authors.lastname: Shores