Heats of Formation for the Boronic Acids R–B(OH)(2) and Boroxines R(3)B(3)O(3) (R=H, Li, HBe, H(2)B, H(3)C, H(2)N, HO, F, and Cl) Calculated at the G2, G3, and G4 Levels of Theory - Bock, Charles W. (2012)