Question

Is `"2-dimethylethanoic acid"` a valid formula?

Answer 1

There ain't no such beast as `"2-dimethylethanoic acid"`.

Explanation:

`"2-dimethylethanoic acid"` is not a valid structure.

Do you mean `"pivalic acid"`, `("H"_3"C")_3"CC(=O)OH"`?