Organic Chemistry Answers

Which of the following molecules is the weakest base?



(1) CH3CH2CH2CH2NH2

(2) CH3CH2NH2

(3) BrCH2CH2NH2

(4) NO2CH2NH2

structure for 2-bromopent-3-yn-2-one

structure for 2-bromopent-3-ynal

structure for 4-bromopent-2-yn-1-al

Aldehydes are more reactive than ketones in nucleophilic addition reactions because:



(1) The carbonyl group is planar in ketones and not in aldehydes

(2) The carbonyl group in aldehydes is not reactive towards electrophiles

(3) Aldehydes are less sterically hindered than ketones

(4) The carbonyl group in aldehydes is a chiral centre

Which of the following synthesis steps can be used to prepare 2-hexanone using 1hexyne as starting material?



(1) Reaction with CH3MgBr, followed by reaction with CO2

(2) Ozonolysis, folloed by the reaction with (CH3)2S (3) Reaction with Hg2+, H2SO4, H2O

(4) Hydrogenation in the presence of Ni, follwoed by oxidation with Na2Cr2O7, H2SO4

What is the major organic product formed when 2-propanone is treated with excess methanol in the presence of strong acid?

Which of the following reagents reduces cyclohexanone to cyclohexanol?



(1) Zn/Hg and acid (2) KMnO4 and base (3) K2Cr2O7 and acid (4) H2 and Pd/C

What is the correct structure of ethyl 3-methylbutanoate?

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