Unformatted text preview: 1A) Name the following. Include stereochemical descriptors, such as R/S or E/Z. 2A) Give the structure for the following. 3A) For the following, Draw the MAJOR stereoisomer or pair of stereoisomers (if each is equally abundant) or constitutional isomer or pair of constitutional isomers (if each is equally abundant) of each reaction. IF ONLY ONE MAJOR (i.e., most abundant) ISOMER IS MADE, THEN WRITE ‘XXX’ IN THE SECOND BOX. 1A 2A 1) NaNH2
C CH O
3) D2O 3A 4A 4A) Complete the synthesis by filling in the boxes with the necessary reactants or products. (No Table provided). 1 equiv 1 equiv
H H H 1)
2) 2) an alkyl tosyl"ate".
Use Ts for Tosyl CH3Br H H 5A Bonus questions (6 pts) 5A) Using wavy lines (as shown in example), indicate which TWO bonds of compound A are commonly cleaved in a mass spectrometer at 70 eV that would reveal the type of compound you had. 6A) CIRCLE the compound that would generate the following mass spectra at 70eV ionization energy. 108
H3C Br compound A MW = 108
CH2 O CH3 compound B MW = 108 ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ 7A) The ion at m/z 82 is derived by loss of what neutral molecule from the molecular ion? 6A ...
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- Spring '07
- H3C, following mass spectra, Include stereochemical descriptors, 70eV ionization energy