One and two-electron hydrogenic, helium and helium-hydrogenic molecular chains in a strong magnetic field

A classification for one and two-electron molecular hydrogenic, helium and helium-hydrogenic chains in a strong magnetic field $B \leq 10^{16}\,$G is given. At very large magnetic fields the longest hydrogenic chains contain at most five protons indicating the existence of the $\rm{H}_5^{4+}$ and $\rm{H}_5^ {3+}$ ions, respectively. It was also found that helium and helium-hydrogenic chains can exist at large magnetic fields with up to three and four nuclei for one and two-electrons, respectively.