Reference Label	Details
est unc	estimated uncertainty
Sendt 2000	K. Sendt and G. B. Bacskay, J. Chem. Phys. 112, 2227-2238 (2000) Spectroscopic Constants of the X(1A1), a(3B1), and A(1B1) States of CF2, CCl2, and CBr2 and Heats of Formation of Selected Halocarbenes: An ab initio Quantum Chemical Study