4th example follow crams model guys.. Large group syn to the corbonyl group, so nucleophile attack medium group side. Medium group is present in the below the plane so incoming nucleophile ( hydride ) attack below the plane....
*Anionic 14 anuluene is aromatic * but sp2 hybridized anuluene is non aromatic because of which create the steric repulsion of four inner hydrogen.* Another one type of mixed with sp and sp2 hybridized anuluene compound is aromatic. Therefore first you have see which kind of 14 anuluene is present then only you have to decided aromatic, non aromatic.
Sorry guys... I don't have material just I will prepare best reference books. Like Clayden, carruther and zweifel for organic chemistry. So please guys refer these kind of books that will be helps you lot.
