Chem 221 exam 4 questions with detailed correct answers

Which reaction occurs with a carbocation? - Correct AnswersSn1 and E1 Which reaction occurs in 1 step? - Correct AnswersSn2 and E2 Involves OH and H2SO4 - Correct AnswersE1 When can primary work with Sn1? - Correct Answers If resonance can be established Which reaction results in a racemic mix? - Correct AnswersSn1 Which reactions won't work with SP2 centers? - Correct AnswersSn1 and Sn2 Which reaction will occur with a strong base? - Correct AnswersE2 Which reaction results in inversion of stereochemistry? - Correct AnswersSn2 T or F: Diels-Alder reactions can ONLY happen in cis conformation - Correct Answerstrue Diene - Correct Answersa hydrocarbon with two double bonds Dienophile - Correct Answersis electron deficient. typically has electron withdrawing groups attached to make it more electron deficient Kinetic product - Correct Answers-favored at a lower temperature -1,2 addition -halide attaches next to hydrogen Thermodynamic product - Correct Answers-favored at higher temperature -1,4 addition -the more stable alkene HOMO - Correct Answerselectron donating (nucleophiles) LUMO - Correct Answerselectron accepting (electrophiles) More conjugated alkenes - Correct Answers-have smaller HOMO LUMO energy -have increasing UV absorbance Benzene - Correct Answers Toluene - Correct Answers Xylene - Correct Answers Naphtalene - Correct Answers Phenol - Correct Answers Aniline - Correct Answers Styrene - Correct Answers Benzoic acid - Correct Answers What are the three rules of aromaticity? - Correct Answers1. odd # of double bonds and lone pairs 2. contiguous P orbitals (NOT sp3) 3. planar T or F: aromatic compounds have bigger pKa values - Correct Answers false Base vs. Nucleophile: base - Correct Answers will attack a hydrogen Base vs. Nucleophile: nucleophile - Correct Answers will attack a carbocation What are the three rules of bases? - Correct Answers1. bases have an OR where O is negative (O-) and R is Na or K (also works with NR) 2. bases have a negative charge 3. bases won't stabilize with resonance