Density functional and coupled-cluster calculations of isodesmic reactions involving fluorine oxides

Some isodesmic reactions, involving the fluorine oxide radical FO, have been studied employing density functional theory (DFT) and coupled-cluster (CC) calculations with an extended, uncontracted basis set. It is shown that CCSD(T) calculations can give more accurate enthalpies of reaction than DFT in some of the non-isodesmic reactions. DFT, however, gives more accurate results than CCSD(T) for the isodesmic reactions considered.