for Pd-Zn and Zn-H bonds compared to Pd-Mg and Mg-H bonds (Table ). QTAIM analysis returns bond paths between Pd and H atoms and Mg and H atoms in 2a (Figure ). NCI plot provides a qualitative approach to visualise attractive and repulsive non- The experimental data and computational analysis of 2a and 2b are important in benchmarking more complex bonding interactions; for example, complexes involving the coordination of three {Mg-H} or {Zn-H} bonds to group 10 metals.