Consequences of different ligands on the structure of Copper (II) coordination complexes

Tinku Saroha, Anirban Deb, Muneer Alam, Meenu Sharma


Coordination chemistry is a branch of chemistry deals with the study of complex formed by transition metal on ligating with ions, atoms and molecules which has tendency to donate pair of electrons to the transition metal [1]. Coordination chemistry gained particular attention because of their versatile applications such as medicinal properties, magnetic properties, optical properties, catalytic properties etc. Coordination complexes are colored compounds as the electrons present in d-orbitals of transition metal has the tendency to interact with the electron cloud of the ligand in such a manner so that the degenerate d-orbitals of transition metal become non-degenerate i.e split into two levels t2g and eg depending upon the geometry of the complex, oxidation state of the metal and nature of the ligands. Copper (II) complexes are of various applications as copper metal has large abundance in nature, important mineral required by human body, its importance in various fields of research, significantly different geometries, because of its d9 system etc. Significantly different geometries of copper (II) coordination complexes arise mainly due to the Jahn Teller distortion, which plays a crucial role in the exchange interactions in copper (II) coordination complexes.

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