  Our gargantuan ab initio all-electron fully relativistic Dirac-Fock (DF),
nonrelativistic (NR) Hartree-Fock(HF) and Dirac-Fock-Breit-Gaunt(DFBG)
molecular SCF calculations for the superheavy octahedral Oganesson
hexatenniside OgTs$_6$ predict atomization energy (Ae) of 9.47, -5.54and 9.37
eV, at the optimized Os-Ts bond distances of 3.35, 3.34 and 3.36 angstroms,
respectively. There are dramatic effects of relativity for the atomization
energy of OgTs$_6$ (with seven superheavy elements and 820 electrons) of ~ 15.0
eV each at both the DF and DFBG levels of theory, respectively. Our calculated
energy of reaction for the titled superheavy reaction Og + 3Ts$_2$ -> OgTs$_6$
at the DF, NR and DFBG levels of theory is 6.33, 8.81, and 6.26 eV,
respectively. Mulliken analysis as implemented in the DIRAC code for our DF and
NR calculations (using the dyall.ev4z basis) yields the charges Og(+0.60) and
Og(+0.96), respectively on the central Og atom indicating that our relativistic
DF calculations predict octahedral OgTs$_6$ to be less ionic. However, due
caution must be used to interpret the results of Mulliken's population
analysis, which is highly basis set dependent.
