For the smaller systems, the basis CBH reaction energies have been obtained from CCSD(T) energies at the complete-basis-set, CBS, limit computed using either RHF-UCCSD(T)-F12b/cc-pVnZ-F12 or RHF-UCCSD(T)/aug-cc-pVnZ. The cc-pVnZ-F12 series provided more rapid basis set convergence, but for some of the smaller species it appears that the aug-cc-pVnZ series provided more reliable convergence. For robustness where possible, both estimates of the CCSD(T)/CBS energies were computed and averaged. Up to the cc-pV5Z-F12 and augcc-pV6Z basis sets have been used. For larger systems, RHF-UCCSD(T)-F12b/cc-pVnZ-F12 energies (with CBS extrapolation where possible) were used.