Synthesis and crystal structure of catena-poly[Rh2(OAc)4(C27H15N3)]•2CH2Cl2, a novel Rh(II) organic/inorganic coordination polymer

A new coordination polymer, catena-poly[Rh-2(OAc)(4)(C27H15N3)] . 2CH(2)Cl(2) 1 has been synthesized by self-assembly from Rh-2(OAc)(4) dimer units and the new ligand, 1,3,5-tris[(2-pyridyl)ethenyl]benzene 2. The compound was characterized by single crystal X-ray diffraction and was found to crystallize in the triclinic space group P-1, with a = 10.8206(9) Angstrom, b = 14.0331(12) Angstrom, c = 15.0901(12) Angstrom, alpha = 113.965(2)degrees, beta = 100.250(2)degrees, gamma = 90.462(2)degrees, and Z = 2. The one-dimensional polymer contains two crystallographically different Rh-dimer units, both located about crystallographic inversion centers. Each Rh-2(OAc)(4) unit connects in a trans fashion with the potentially tridentate ligand giving an overall 1:1 metal dimer-to-ligand ratio. This arrangement leaves a third nitrogen donor site on the ligand uncoordinated.