Heats of formation are calculated from single point energies and scaled 71 vibrational frequencies via Arkane 44 using the rigid rotor harmonic oscillator (RRHO) approximation. While the details of performing these calculations are well covered in the literature (we direct the interested reader to the Gaussian thermochemistry white paper for a thorough introduction), we will cover some of the details here to shed some light on particular decisions made that affect how we define terms like atomization energy corrections.