Hydroboration-oxidation of (E)-2-( p-anisyl)-2-butene yielded an alcohol A, mp 60°C, in 72% yield. When the same reaction

Question:

Hydroboration-oxidation of (E)-2-( p-anisyl)-2-butene yielded an alcohol A, mp 60°C, in 72% yield. When the same reaction was performed on the Z alkene, an isomeric liquid alcohol B was obtained in 77% yield. Suggest reasonable structures for A and B, and describe the relationship between them.