Cobalt nitrate coordination polymer properties

The structure of the complex consists of discrete [Co (L) 6] 2+ cations and NO3- anions. The Co2 + ion has a centrosymmetric octahedron configuration with a coordination site - CoN6. The ligand is coordinated monodentate through the pyridine nitrogen atom (N3) to the Co2 + ion with an average Co – N bond distance of 2.1590Ǻ. Molecules in the coordination polymer are additionally linked by intermolecular hydrogen bonds through the pyrrole nitrogen atom (-N-H) and oxygen of the nitrate group with the formation of a polymer chain of the type: N-H… O. The chains are linked in layers along the (001) plane.

该配合物由离散的[Co(L)₆]²+阳离子与硝酸根(NO₃⁻)阴离子组成。Co²+离子呈现中心对称的八面体配位构型，配位位点为CoN₆。配体通过吡啶氮原子(N3)以单齿形式与Co²+离子配位，Co-N键的平均键长为2.1590 Å。该配位聚合物的分子还借助吡咯氮原子(-N-H)与硝酸根基团的氧原子形成分子间氢键，进而形成N-H…O型的聚合物链。这些聚合物链沿(001)晶面堆叠形成层状结构。