Author: Anonymous

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

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?

What is (are) the major 1,2 and 1,4 products of the following reaction?

Identify the molecular orbital energy diagram for the cyclopropenyl anion, shown in the box below, and predict if it is aromatic, antiaromatic, or nonaromatic.

________ is used as a reference for recording NMR spectra and is assigned a chemical shift value of zero.

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

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)

Find the indicated intercept(s) of the graph of the function.y-intercept of

Extra Credit: Max 5 points Write a small class GradeTracker that takes a list of numeric scores in its constructor and stores them as a NumPy array (or pandas Series). Add a method average() that returns the mean of the scores.