![]() If you recall the chelate effect, it essentially states that the binding of more than one "tooth" is entropically favored, relative to binding with one "tooth". ![]() Hence, we can call this a 1,2-diimine.Įach dimethylglyoximato ligand (abbreviated DMG in compound names) has a net charge of #\mathbf(-1)#, and each nitrogen acts as a binding site due to their lone pairs of electrons. If we call one of the imine carbons "carbon-1", then the other imine carbon is one atom away (meaning, on "carbon-2"). An example of a 1,2-diimine is the dimethylglyoximato ligand (which somewhat resembles a conjugated diene for Diels-Alder reactions).Īs a general rule, "bis" is used to indicate two of the same, complicated ligand.
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