Geometries, vibrational frequencies, and excitation energies of a series of fluorine-substituted carbenes, FCX (X = H, F, Cl, Br, and I): A high-level multireference configuration interaction study. - Sun, Erping; Zhang, Junfeng; Li, Rui; Sun, Qixiang; Wei, Changli; Xu, Haifeng; Yan, Bing (International Journal of Quantum Chemistry, 2014)