Octahedral or near octahedral complexes have been subjected to intense investigation, due to their role in understanding the different models of Jahn Teller distortions, viz., dynamic, static and tunneling [1-9]. Most of the copper complexes exhibit tetragonally elongated octahedral geometries, due to J-T vibronic coupling. The compressed geometry observed in a few cases, is in fact, due to the ligand field or steric strain [10]. Intrinsic J-T coupling of Cu 2+ ion completes with the crystal lattice strain effect and results in dynamic J-T property [10-15]. Temperature dependent EPR spectroscopy has been employed to study such dynamic J-T behaviour [16]. Dynamic J-T effect, called as pseudo J-T effect is observed in Cu 2+ ions, present in a site of lower symmetry [17,18]. Such dynamic behaviour is explained using different theoretical models. Complexes, reported to have tetragonally compressed geometry and d z 2 ground state, were found to result from the dynamic equilibrium between the long and intermediate bonds of the tetragonally elongated octahedra with d x 2-y 2 ground state, leading to plasticity [14]. Under the fluxional model [2], the observed stereochemistry at a particular temperature is determined by the relative thermal population of the three available potential energy wells. Each of the well corresponds to an elongated octahedron, misaligned in three mutually perpendicular directions. Hopping