MCAT Organic Chemistry verified/passed

MCAT Organic ChemistryWhat are the four rules for writing resonance structures? - correct answer 1. Atoms must not be moved. Only electrons. 2. All resonance atoms must lie in the same plane. 3. Only valid Lewis structures are allowed. 4 . The number of unpaired electrons must remain constant. What are the two conditions for resonance? - correct answer 1. An atom must have a P orbital or a lone pair of electrons. 2. It must be single bonded to an atom that has a double or triple bond. The latter compromise conjugated unsaturated systems. Huckel's Rule - correct answer Planar monocylic rings with (4n+2) Pi-electrons must be aromatic (have resonance). What is the condition for a chiral center? - correct answer First, the participant in question cannot be a halogen, a CH2 group, an Oxygen, a Halogen, or any Carbon participating in a double or triple bond. Then list the groups attached to a Carbon. They MUST be four different groups. If the conditions are met, then the Carbon in question is a chiral center. How do you determine Absolution Configuration? - correct answer First, prioritize the atoms in terms of atomic weights (if two atoms are the same element, then their substituents are compared to determine priority. Substituents on double and triple bonds count 2 and 3 times, respectively). Now,