Data for \(\ce{C4H^-}\) — Butadiynylide ion

Please acknowledge the use of EMAA Database by citing the above original articles (BibTeX format available), and adding the following sentence in your publication:
This research has made use of spectroscopic and collisional data from the EMAA database (https://emaa.osug.fr and https://doi.org/10.17178/EMAA).