methaniden.

1924 J. W. Mellor Comprehensive Treat. Inorg. & Theoret. Chem. V. 846 Methanides are derivatives of methane because they furnish that gas when treated with water or dil[ute] acid—e.g. beryllium, aluminium, and manganese.

1943 Jrnl. Amer. Chem. Soc. 65 606/1 On their surfaces..were large deposits of carbon, and a trace of a substance which appeared to be the methanide Al₄C₃.

1962 P. J. Durrant & B. Durrant Introd. Adv. Inorg. Chem. xv. 425 Beryllium methanide, Be₂C, is a brick-red compound, hard enough to scratch glass and quartz.

1965 Nomencl. Org. Chem. (I.U.P.A.C.) C. 255 Methanide.

1988 Jrnl. Chem. Soc.: Perkin Trans. 1 803 Thiopheniobis(alkoxycarbonyl) methanides undergo intramolecular rearrangement when heated to give 2H-thiopyrans as thermally unstable kinetic products. When the methanides are subjected to prolonged heating thiophene-2-malonates are produced as the major rearrangement products.

1990 Nomencl. Inorg. Chem. (I.U.P.A.C.) 110 Anions derived from neutral molecules by loss of one or more hydrons..H₃C⁻ methanide, or methyl anion.

1990 Angewandte Chemie (Internat. ed.) 29 910/1 In addition to hydride transfer, methanide transfers have been observed for the first time. For the migration of R = CH₃⁻, we have found [etc.].

1990 Jrnl. Organometallic Chem. 394 744 A complex containing the methanide ligand as a P,P′-chelate has been made.

1989 Jrnl. Chem. Soc.: Perkin Trans. 1 2329/1 o-Quinone methanides have been postulated as reactive intermediates in organic reactions for many years, since they add nucleophiles to the methanide carbon.