I was going through my text book, (Solomon&Frhyle) I came across a couple of of examples which I didn't understand.
How is the molecule symmetrical? Upon folding the molecule over its plane of symmetry the cooh group will be placed over fluorine.
Similarly in this in structures 3,4,5,6 a chlorine atom out of the plane and below the plane coincide.
3. It's written that for biphenyls to be chiral a can be the same as a'. (Same for b and b') But If a a' and b b' are the same them won't a plane of symmetry lie in the middle perpendicular to the plane of molecule.