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Our all-electron fully relativistic Dirac-Fock (DF) and nonrelativistic (NR)Hartree-Fock (HF) SCF molecular calculations for the superheavy tetrahedral(T$_d$) oganesson tetratennesside OgT$_4$ predict atomization energy (Ae) of7.45 and -11.21 eV, respectively. Our DF and NR calculations, however for thesquare planar (D$_{4h}$)OsTs$_4$ predict atomization energy (Ae) o 6.34 and-8.56 ev, respectively. There are dramatic relativistic effects for theatomization energy of T$_d$ and D$_{4h}$ OgT$_4$ of -18.65 eV and 14.90 eV,respectively. Whereas our DF calculations predict the T$_d$OgT$_4$ to be morestable than the D$_{4h}$ OgT$_4$ by ~1.10 eV, our NR calculations predict theD$_{4h}$ OgT$_4$ to be more stable than the T$_d$ OgT$_4$ by ~2.65eV. Our NRcalculations predict both the T$_d$ and D$_{4h}$ OgTs$_4$ to be unbound by11.21 and 8.56 eV, respectively. However our relativistic DF calculationspredict both the T$_d$ and D$_{4h}$ OgT$_4$ to be bound by 7.45 and 6.34 eVrespectively and so the relativistic treatment is mandatory for bonding andbinding in the pentatomic superheavy system with 586 electrons involving thetwo heaviest SHE Ts and Og.

Relativistic effects for the superheavy reaction Og + 2Ts$_2$ ->  Og(Ts)$_4$ : Dramatic relativistic effects for the atomization energy of  Oganesson tetratennesside Og(Ts)$_4$ and the prediction of the existence of  tetrahedral Og(Ts)$_4$