AbstractPrevious attempts to determine the strengths of multiple metal‐metal bonds are reviewed. Estimates of 73 and 97 kcal/mole for the MoMo bond energies in Mo2Cl 84−and Mo2(O2CH)4, respectively, are obtained by combining the known experimental bond energy in Mo2(96.5 ± 5 kcal/mole) with the results of SCF‐Xα‐SW calculations on Mo2, Mo2Cl 84−, and Mo2(O2CH)4. Possible errors in the estimates are discussed. It is noted that the quadruple bonds in the complexes are predicted strongerper componentthan the sextuple bon