Question

what are methanides?

Answer 1

ionic carbide. in carbide: Ionic carbides. Ionic carbides have discrete carbon anions of the forms C 4−, sometimes called methanides since they can be viewed as being derived from methane, (CH 4); C 2 2−, called acetylides and derived from acetylene (C 2H 2); and C 3 4−, derived from allene (C 3H 4).

Answer 2

Carbides which give methane on hydrolysis are called methanides.

Example :- Be2C, Al4C4