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Pokhrel, N.; Lamichhane, H. P. Natural Bond Orbital Analysis of [Fe(H<sub>2< sub>O)<sub>6< sub>]<sup>2+ 3+< sup> and [Zn(H<sub>2< sub>O)<sub>6< sub>](H<sub>2< sub>O)<sub>N< sub><sup>2+< Sup>;N=0-4. J. Inst. Sci. Tech. 2018, 22, 148-155.