Official course description: Prereq: CHEM 178 or CHEM 201, enrollment in CHEM 331L highly recommended The first half of a two semester sequence. Modern organic chemistry including nomenclature, synthesis, structure and bonding, reaction mechanisms. For students majoring in physical and biological sciences, premedical and pre-veterinary curricula, chemistry and biochemistry. Students desiring only one semester of organic chemistry should take 231 and 231L, not 331. Only one of Chem 231 and 331 may count toward graduation.