DBF	dibenzofuran
DBT	dibenzothiophene
CA	carbazole
BF	benzofuran
BT	benzothiophene
IN	indole
NSO-HETs	nitrogen, sulfur, or oxygen heterocycles
PACs	polycyclic aromatic compounds
PAHs	polycyclic aromatic hydrocarbons
DFT	density functional theory
CVT	canonical variational transition state
SCT	small-curvature tunneling
CPDyl	cyclopentadienyl radical
ZPE	zero-point energy
IRC	intrinsic reaction coordinate