Reference no: EM13132119
1. Nitroethane [CH3CH2NO2, pKa=8.6] is a much stronger acid than ethane [CH3CH3, pKa > 60]. Explain
2. Write a complete stepwise mechanism for the reaction of cyclopentanone with bromine in acetic acid to give 2-bromocyclopentanone. Show all intermediate structures and all electron flow with arrows.
3. In the alkylation of cyclohexanone, better yields are obtained by first reacting cyclohexanone with an equivalent of lithium diisopropylamide in THF and then adding the alkyl halide, rather than mixing cyclohexanone, akyl halide, and a catalytic amount of sodium ethoxide in ethanol. Explain this observation by pointing out what the problems with the second reaction conditions might be and how the first set of reaction conditions help alleviate the problems.
4. Ethyl acetate can be prepared from ethanol as the only organic starting materal. Show all reagents and structures for all intermediates in this preparation.
5. Consider the compound 2-methyl-2-carboethoxycyclopentanone (structures wasn't provided)
Formulate a synthesis of 2-methyl-2-carboethoxycyclopentanone starting with acyclic precursors using a Dieckmann cyclization as a key carbon-carbon bond forming step. Show all reagents and all intermeidate structures.
6. Oxaloacetic acid is an important inetermediate in the biosynthesis of citric acid. Synthesize oxaloacetic acid using a mixed Claisen condensation as a key carbon-carbon bond forming reaction.
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Problem related to pension asset
: A pension asset is reported when: a. the accumulated benefit obligation exceeds the fair value of pension plan assets. b. the accumulated benefit obligation exceeds the fair value of pension plan assets, but a prior service cost exists.
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Calulate the concentration of the diluted naoh solution
: An unknown amount of water is mixed with 370mL of a 6M solution of NaOH solution. A 75mL sample of the resulting solution is titrated to neutrality with 50.7mL of 6M HCl.
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Find the probability of winning at least one contract
: If the company loses contract A, the probability winning contract B decrease to .2. Find the probability of the following events. Winning both contracts
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Math problem-ending balance-interest and pay out
: If I have a 10,000 death benefit at work that is left on deposit for 7 years at an annual interest rate of 5%. The balance after 7 years is what? and then is going to be paid out in 120 equal payments.
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Write a complete stepwise mechanism for the reaction
: Write a complete stepwise mechanism for the reaction of cyclopentanone with bromine in acetic acid to give 2-bromocyclopentanone. Show all intermediate structures and all electron flow with arrows.
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Amendment of a pension plan
: When a company amends a pension plan, for accounting purposes, prior service costs should be:
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Real-world application that shows two related sets
: Example of Sets in applicable areas such as (market research, politics, medicine, etc.). For example, a college student may be in a particular category in a set depending on degree program:
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Explain duopoly and monopoly market structures
: Explain duopoly and monopoly market structures, and identify the key factors that distinguish them.
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Neuda''s poetry
: A student who has just completed years studying Japanese literature writes a paper on haiku.2. A high school student puts his opinion on Emily Dickerson on the internet.
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