The data for Hydroxymethylium were taken from (1) D. Chomiak, A. Taleb-
Bendiab, S. Civis, and T. Amano, Can J. Phys. 72 (1994) 1078; and
(2) L. Dore, G. Cazzoli, S. Civis, and F. Scappini, Chem. Phys. Lett.
244 (1995) 145.