Results for the trimolecular mechanism in computed using DLPNO-CCSD method using the def2-TZVPp basis set on B3LYP-D3/6-31g(d,p) geometries. The first column shows the pro-chiral face arrangement. ΔE^# labels the transition state energies; ΔE^CMPX labels the stabilization energies of the pre-reaction complexes, and ΔE^R the energy differences between the product complex and the pre-reaction complex. Energies are in kcal mol⁻¹.

Isomer[b]	ΔECMPX	ΔE#	ΔER
(Re,Re)-5	−11.39	1.42	−26.99
(Re,Si)-5	−18.00	2.79	−18.27
(Re,Re)-6	−19.22	3.46	−20.62
(Re,Si)-6	−18.01	11.31	−21.84