The proton NMR of 1,1-dibromoethane (see right) would appear as a: Br-c-c-H Br H
ID: 882919 • Letter: T
Question
The proton NMR of 1,1-dibromoethane (see right) would appear as a: Br-c-c-H Br H (a) downfield doublet and upfield quarter (c) downfield doublet and upfield triplet (b) downfield quarter and upfield doublet (d) downfield triplet and upfield doublet 10 corresponding integrations in a 3:2 ratio, respectively. Which compound below is the best match for the spectrum? The proton NMR spectrum of a compound gives a singlet at 2.10 and 2.56 with CH3OCH2CH200% CHyCCH2CH2CCH3 (a) (c) (b) CH3OCCH2CH2COCH3 (d) CH3CH2C-CCH2CH3 -_-_ Identify the C,H,Cl isomer given the following proton NMR data (NOTE: a "multiplet" is a splitting pattern that's a bit too messy to decipher easily) (a) CH3)cCi (c) CH3CH2CHCH3 doublet, 104 (6H) multiplet,' 1 95 ( 1 H) doublet·63.35 (2H) CI (b) CH3CH2CH2CH2 (CH3)2CHCH2C 12. 5 pts] Use curved-arrow notation to write out the complete mechanism for the formation of the electrophilic species (SO,H) present in the sulfonation reaction of aromatic compounds with concentrated sulfuric acid (H,SO)
Explanation / Answer
9) b
10) c
11) d
12)
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