2008 exam with answers

2008 exam with answers - 1 Which orbital drawing best...

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Page 3 Continued on next page 1. Which orbital drawing best represents the carbonyl bonding π molecular orbital of propenoic acid (acrylic acid)? 2. Rank the following intermolecular interactions in order of increasing strength. i. van der Waals interaction ii. ionic interactions iii. hydrogen bonding iv. dipole - dipole interactions A. i < ii < iii < iv B. i < iv < iii < ii C. ii < iii < i < iv D. iv < i < ii < iii E. iii < ii < i < iv O O H O O H O O H O O H O O H A B C D E
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Page 4 Continued on next page 3. Identify the correct rankings of acid strengths in the pairs of compounds listed below i. propanol > propane ii. ethanol > aminoethane iii. ethene > ethyne iv. 2-chloro acetic acid > 2-fluoro acetic acid A. i, ii B. i, iii C. ii, iii D. ii, iv E. iii, iv 4. The three structures below all represent dichloro-dimethylcyclopentane. Indicate the correct statements with respect to these structures. H H Cl Cl H H Cl Cl Cl H Cl I II III A. i and ii are enantiomers, while iii is a meso compound B. i and iii are enantiomers, while ii is a meso compound C. ii and iii are enantiomers, while i is a meso compound D. ii and iii are identical compounds, while i is a meso compound E. i and iii are all identical structures, while ii is a meso compound
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Page 5 Continued on next page 5. Indicate the correct statements below: i. S N 2 reactions, due to their bimolecular nature, are always faster than S N 1 reactions ii. In E2 and S N 2 reactions, the properties of the leaving group plays an important role iii. E1 reactions often lead to mixtures of products, and are hence rarely desirable.
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This note was uploaded on 09/28/2010 for the course MATH 1025 taught by Professor Tammie during the Fall '10 term at York University.

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2008 exam with answers - 1 Which orbital drawing best...

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