We present quantal reaction rate coefficients obtained from well-conve
rged cumulative reaction probabilities calculated by an algebraic vari
ational method for total angular momentum J in the range 0-6 and obtai
ned from the separable-rotation approximation for J not equal 6. These
results are used to test variational transition state theory calculat
ions with optimized multidimensional tunneling contributions and are c
ompared to experiment.