CHEM263 Lecture Notes - Lecture 7: Benzyl Bromide, Tetrahydrofuran, Acetophenone
19 May 2016
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Question 1 [2 marks for each part] nomenclature. Use cis, trans, z or e, as appropriate. Question 2 [2 marks for each part] aromatic substitution. More than one product may be expected in certain cases, but only a single electrophilic substitution occurs. (i) N conc hno3, conc h2so4 fuming h2so4 t-bucl, alcl3. Question 3 [4 marks for each part] mechanism. Give the mechanism of the following reactions. (i) The proton nmr spectra of two isomers of formula c5h10br2 are summarized below. Deduce the structure of each compound. (a) [5 marks] 1. 0 (singlet, 6 h), 3. 4 (singlet, 4 h). 6 (b) [5 marks] 1. 0 (singlet, 6 h), 2. 4 (quartet, 4 h). (c) [10 marks] fill in the blank spaces in the following statement: In the nmr spectrum of ethyl bromide, the methyl hydrogens have = 1. 7 ppm, the methylene hydrogens have = 3. 3 ppm, and j. The number of peaks given by the methyl hydrogens is with the approximate area ratio:
