&lt;strong&gt;Synthesis, Characterization and DFT calculations of Novel Mononuclear Nickel&lt;/strong&gt; &lt;strong&gt;(II), Cobalt (II) and Iron&lt;/strong&gt; &lt;strong&gt;(II) Complexes derived from 2-(1H-benzimidazol-2-yl)-&lt;/strong&gt; &lt;strong&gt;phenol Ligand &lt;/strong&gt;