A Rare Example of a Dinuclear Cobalt(II) Complex with Dipicolinate and Bridging 2-Aminopyrazine Ligands. Preparation, Structural, Spectroscopic and Thermal Characterization

作者：Tabatabaee Masoumeh^*; Kukovec Boris Marko; Razavimahmoudabadi Vajieh

来源：Zeitschrift Fur Naturforschung Section B-a Journal of Chemical Sciences, 2011, 66(8): 813-818.

DOI：10.5560/znb.2011.66b0813

• Cobalt
• Dipicolinic Acid
• 2-Aminopyrazine
• Dinuclear Complex
• X-Ray Diffraction

A dinuclear cobalt(II) complex, [Co-2(H2O)(4)(dipic)(2)(mu-apyz)] (dipicH(2) = pyridine-2,6-dicarboxylic (dipicolinic) acid, apyz = 2-aminopyrazine) (1), has been hydrothermally synthesized and characterized by elemental analyses, spectroscopic methods (IR, UV/Vis), thermal analysis as well as by X-ray diffraction studies. The dinuclear complex is composed of two cobalt(II) ions bridged by a 2-aminopyrazine molecule. Each cobalt(II) ion is coordinated by one nitrogen and two oxygen atoms of the tridentate dipicolinate anion, one heterocyclic nitrogen atom of the 2-aminopyrazine and two oxygen atoms of coordinated water molecules. The resulting geometry for the CoN2O4 coordination environment can be described as distorted octahedral. Various hydrogen bonds of the type O-H center dot center dot center dot O and N-H center dot center dot center dot O are also present in the crystal structure. This arrangement leads to the formation of a 3D structure.

• 出版日期2011-8