Enantiomers are stereoisomers that are non-superimposable mirror images of each other, typically having at least one chirality center (or chiral carbon). However, if a molecule does not have any chirality centers, it will not have enantiomers; therefore, it will not be possible to provide three-dimensional formulas for enantiomers of molecules without chirality centers.
To assist you better, could you provide a specific list of molecules you would like me to evaluate for chirality? This will allow me to help identify which ones have chirality centers and explain their three-dimensional shapes.