exam4key

exam4key - CHEM 233, Fall 2007 Final Exam Ian R. Gould...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Final Exam Ian R. Gould PRINTED FIRST NAME 9 / 54 Total / 375 + 5 8 / 48 7 / 20 6 / 15 ASU ID or Posting ID Person on your LEFT (even if there are empty spaces between you, or print Aisle ) 5 / 15 H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn 10 / 40 basicity ranking E2 Reactions 3 mechanisms mechansim -H2O ANSWER KEY Be sure your exam has 8 numbered questions on 6 total pages Use any blank pages as scratch paper. They will not be graded. Write CLEARLY. Illegible answers will be considered to be incorrect. Molecular models are allowed. Do not use red ink. DON'T CHEAT, USE COMMON SENSE! READ THE DIRECTIONS FOR EACH PROBLEM CAREFULLY! CHEM 233, Fall 2007 RIGHT PRINT YOUR NAME ON EACH PAGE! LAST NAME H / H ~1.0 Eclipsing H / Me ~1.4 Me / Me ~2.6 Me / Me ~0.9 Et / Me ~0.95 i-Pr / Me ~1.1 t-Bu / Me ~2.7 Gauche Extra / 5 Me / Et ~2.9 11 / 20 mxn RED Interaction Energies, kcal/mol 3 / 15 2 / 15 1 / 12 nomenclature acidity Lewis acid/base 4 / 14 M.O. 12 / 20 13 / 36 faster? acid/base RED 14 / 20 syntheses whichcorrect 15 / 6 spectrum 16 / 25
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
CHEMISTRY 233, Fall 2007 FINAL EXAM - 2 - Question 1 (12 pts.) Give the IUPAC name for the following. Specify stereochemistry as appropriate. NAME 2-bromo-(6R)-fluoro-2,4-dimethylhept-(3E)-ene F Br Question 2 (15 pts) Which of the indicated protons, Ha or Hb is more acidic? Give a BRIEF explanation, and illustrate your choice using resonance contributors O HaO Hb O HaO – Ha O O Hb O O Hb O HaO O HaO two resonace structures upon deprotonation of Ha, three for deprotonation of Hb, both have 1 structure with formal negative charge on oxygen, the anion from Hb is more stable, Hb is more acidic – Hb B H H H B H H H B H H B H H H OH O H H + OH B is more exothermic since the products have more electrons lower in energy in covalent bonds + OH + A B Question 3 (15 pts.) For the following reactions A and B a) Add the curved arrows that indicated bond breaking/making and indicate the Lewis acid/base and whether they are also Brønsted acids/bases b) Iindicate which is more exothermic and give a BRIEF explanation. LA/BA LB/BB BB LA
Background image of page 2
Question 4 (14 pts.) a) Draw a picture of the wavefunction, OR the wavefunction squared AS REQUESTED , of the molecular orbitals requested, on the molecules . In each case indicate the A.O.'s used to make the M.O.'s.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 11

exam4key - CHEM 233, Fall 2007 Final Exam Ian R. Gould...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online