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Sch 102: Chemistry Of Alkanes And Cycloalkanes Question Paper

Sch 102: Chemistry Of Alkanes And Cycloalkanes

Course:Organic Chemistry

Institution: University Of Nairobi question papers

Exam Year:2012

UNIVERSITY OF NAIROBI
UNIVERSITY EXAMINATIONS 2011/2012
CONTINUOUS ASSESSMENT TEST

SCH 102: CHEMISTRY OF ALKANES AND CYCLOALKANES

DATE: 4TH MAY 2012 TIME: 4.00 TO 5.00

ANSWER ALL QUESTIONS
Q1 a) What do you understand by each of the following?
(i) Intramolecular forces [1 mark]
(ii) chiral centre [1 mark]

b) In a laboratory experiment to prepare N-ethylethanamide (CH3CH2NH2COCH3), 10 g of ethanamine (CH3CH2NH2) were refluxed with 14 g of ethanoic anhydride (CH3COOCOCH3).
(i) Write a balanced equation for the reaction [1 mark]
(ii) Find the limiting reagent (show your calculation) [4 marks]
(iii) Calculate the theoretical yield of methanol [2 marks]

Q2 a) For the compound 2,3-dibromobutane [CH3CH(Br)CH(Br)CH3], draw the Fischer projection formula for all the stereoisomers, with enantiomers opposite each other. Label each chiral centre with the correct absolute configuration (R or S) and indicate the meso compound if any. [8 marks]

b) Write the IUPAC name for each of the following compounds. Include the stereochemistry in the name if shown.

[9 marks]

Q3 a) Write the name of the functional group in each of the following compounds and indicate the laboratory reagent/s you would use to identify the group. Indicate the expected observation in each case.
[6 marks]
b) Write the reaction mechanism using curly arrows to show movement of electrons for the following reaction
[8 marks]

Sch 102: Chemistry Of Alkanes And Cycloalkanes Question Paper

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