attempt to consider the question as to whether homopolar dihydrogen contacts may also be exploited, i.e. those between atoms of the same sign charge, for instance to geometrically engineer lattice instabilities in crystal lattices, alluding to other geometrical schemes applied to generate low symmetries in solids [2][3][4][5]. To investigate this, we choose one of the simplest and best known structure types known to solid state science, the ABX 3 perovskite. Perovskite functionalities are known to be extremely sensitive to small structural distortions, and many properties adopt critical values across phase transitions, which hence play a crucial role in perovskite engineering. This concerns, for instance, electronic and magnetic transitions,