We next investigated isotopologic reaction H + D 2 --→ HD + D, in which a deuterium atom rather than a protium atom is transferred. The experimental 102,105,106 and computational results are presented in Figure . The performance of each method is very similar to the hydrogen-atom-transfer case, except that since D has a weaker tunneling contribution, the underestimation by the methods without tunneling transmission coefficients is less significant. It is encouraging that results from CNEO-TST calculations agree well with experiment and with CVT/SCT for both isotopologues.