A compound, with molecular formula C4H9Br, displays the 1H NMR spectrum shown and 13C NMR spectra. Propose a structure for this compound.

Which one of the following molecular orbitals of 1,3-butadiene has the most nodes? 

How many nuclear spin states are possible for the 1H nucleus?

Which of the compounds shown gives a 1H NMR spectrum consisting of only a singlet?

How many signals would you expect in the 1H NMR spectrum of the compound given?

08)  a) (6 points) Evaluate

Propose a structure for a compound, with molecular formula C8H14O3, that fits the following spectroscopic data:IR: 1820cm-1, 1760cm-11H NMR: 1.0 δ (triplet, 6H), 1.6 δ (sextet, 4H), 2.2 δ (triplet, 4H)

A compound with a molecular formula of C5H10O has the 1H NMR spectrum shown. Which structure shown is consistent with this spectrum?

Which of the protons shown appear farthest downfield in the 1H NMR spectrum?

Classify the following compounds as having cumulated, conjugated or isolated double bonds.