Comment on Quintuple-ζ quality coupled-cluster correlation energies with triple-ζ basis sets by D. P. Tew, W. Klopper, C. Neiss and C. Hättig, Phys. Chem. Chem. Phys., 2007, 9, 1921 [erratum]
After rectifying a small programming error, CCSD(F12) correlation energies are even better than previously reported, particularly for double-ζ basis sets.