BackThe spectrum of trans-hex-2-enoic acid follows.
(a) Assign peaks to show which protons give rise to which peaks in the spectrum.
(b) Draw a tree to show the complex splitting of the vinyl proton centered around 7 ppm. Estimate the values of the coupling constants.
Draw a splitting diagram for the Hb proton if Jbc = 10 and Jba = 5.
Draw a splitting tree, similar to Figures 13-32 and 13-33, for proton Hc in styrene. What is the chemical shift of proton Hc?
Draw the expected signal for a hydrogen with the following coupling constants.
(a) Hₐ : δ 5.34 (Jₐ꜀ = 12 , Jₐ₆ = 2)
What coupling constant would you expect between Hₐ and H₆ in cyclopent-2-en-1-one?
Draw a diagram like the one shown in Figure 14.12 to predict
b. the relative intensities of the peaks in a quintet.
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Draw a splitting diagram for Hb, where
a. Jba = 12 Hz and Jbc = 6 Hz.
Using a 60-MHz spectrometer, a chemist observes the following absorption: doublet, J = 7 Hz, at δ4.00
(a) What would the chemical shift (δ) be in the 300-MHz spectrum?
(b) What would the splitting value J be in the 300-MHz spectrum?
(c) How many hertz from the TMS peak is this absorption in the 60-MHz spectrum? In the 300-MHz spectrum?
Draw a tree diagram for H* in the structure below.
F2CH*CH(CH3)2 JH*-F = 50 Hz
JH*-H = 7 Hz