Synthesis and Structural Characterization of a Novel Cobalt Complex with (2E, 5E)-2,5-Bis(pyridin-3-ylmethylene)cyclopentan-1-one Ligands

Abstract

A novel cobalt complex, (L¹)₂Co₂(hfac)₄, (1), where L¹ is (2E, 5E)-2, 5-bis(pyridin-3-ylmethylene)cyclopentan-1-one, has been synthesized and characterized by infrared spectroscopy, elemental analysis, and single-crystal X-ray diffraction. The crystal of 1 is monoclinic, sp. gr. P2₁/c with the unit cell parameters a = 8.9700(3), b = 10.9323(4), c = 31.5197(11) Å, and β = 102.470(3)°, Z = 2, R₁ = 0.0866, and wR₂ = 0.2528 (I > 2σ). The Co²⁺ ion has a distorted tetrahedral environment with four O atoms from two hfac ligands and two N atoms from two L¹ ligands. The solid state of 1 consists of numerous hydrogen bonds, which are propagating the molecules to form a 3D network.