andersen237_ex1_pkt - The ammonium ion(NH pKa=9.25 has a...

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The ammonium ion (NH,+ pKa=9.25) has a lower pKa than methyla~nnionium ion (CH,NH,+ pKa=10.66). Which is the stronger base, ammonia (NH,) or methyl arnine (CH,NH,)? Explain. (2 points) Draw a Lewis structure for nitrate anion ( NO3 - ) and its conjugate acid.(3 points) Draw a chair conforn~arion of <:is-3-111ethyl-I -clilorocyclohexane (4 points) Is the chair you've drawn above the most stable conformer (yes or no) point) Draw the highest energy 'coafi~rmer' of butane as a Newmnn projection. (5 points)
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Classify the following organic reactions -- use AIB for an acidlbase reaction, A for addition, R for rearrangement. S for substitutioo, and E for elimination to indicate the reaction type. (7 points)
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1% (w 4. Draw a reaction course energy diagram for a two-step reaction that releases energy and whose first step is faster than its second step. Label the parts of the diagram corresponding to reactants, products, tiansition states, intermediate, activation energies, and overall energies. 5 Does 6-isopropyl-2,2-dir~ietl1ylnoriane liave a quaternary carboll in its structure. (2 points) 6. Rank in order of increasing acidity (1 rimst acidic, . . . 5 least acidic): (I point each) 7 Draw tile Lcwis structure of each r~iolccule (or ion) nlld indicate whether it can be l icwis acid, Lewis base, butll, or wither. (7 points) a) CI-13NH2 b) CNCH, c) (CI4, ),CH' d) Cl~301-I e) HF
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+ (07) 6. Draw a Lewis structure for methoxymethyl nitrite (H3COCH20NO) (06) 7. Explairi why acetic acid (H3C-C02H) is much more acidic than ethanol (H3C-CH20H).
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This note was uploaded on 07/29/2009 for the course ENGLISH engl 500 taught by Professor Ruther during the Spring '09 term at École Normale Supérieure.

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andersen237_ex1_pkt - The ammonium ion(NH pKa=9.25 has a...

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