Coordination complexes of main group metals with ns 2 lone-pair electrons offer a variety of stereochemical activity due to which the main group metals show a rich coordination chemistry. The possibility of multiple bonds and deformation of the coordination sphere lead the complexes to show a diverse structure-property relationship for functional materials. This deformation in the structure may lead to multiple potential applications which include varied optical properties, and catalysis. Until now the most reported and well explored metal complexes are the 3d and 4d series transition metals, and their chemistry and photophysics are well understood. Common perception implies that transition metals possess a richer chemistry than the main group metals due to which the properties of these main group metals are often overlooked. In comparison to transition metals, main group metal coordination complexes are under-explored as they are usually diamagnetic, and the valence orbitals involved are s or p. The possibility for the formation of multiple coordination environments, limited solubility, and dissociation of the complexes in solution have hindered their studies.