Reference Label	Details
est unc	estimated uncertainty
Osborn 2014	D. L. Osborn, K. M. Vogelhuber, S. W. Wren, E. M. Miller, Y.-J. Lu, A. S. Case, L. Sheps, R. J. McMahon, J. F. Stanton, L. B. Harding, B. Ruscic, and W. C. Lineberger, J. Am. Chem. Soc. 136, 10361–10372 (2014) Electronic States of the Quasi-Linear Molecule Propargylene (HCCCH) from Negative Ion Photoelectron Spectroscopy