Fig. 2

(a) ORTEP diagram, (b) distorted square planar, (c) DFT optimization, and (d) DFT-tetrahedral structure of cis-Ni(PPEHDC)2 complex
(a) ORTEP diagram, (b) distorted square planar, (c) DFT optimization, and (d) DFT-tetrahedral structure of cis-Ni(PPEHDC)2 complex