D And F Block Elements

\(\mathrm{PEt}_3\) and \(\mathrm{AsPh}_3\) as ligands can form \(\mathrm{d} \pi-\mathrm{d} \pi\) bond with transition metals

The \(\mathrm{N}-\mathrm{N}\) single bond is as strong as the \(\mathrm{P}-\mathrm{P}\) single bond

Nitrogen has unique ability to form \(p \pi-p \pi\) multiple bonds with nitrogen, carbon and oxygen

Nitrogen cannot form \(\mathrm{d} \pi-\mathrm{p} \pi\) bond as other heavier elements of its group