1.  The following proton spectra were obtained  for compounds with the molecular formula of C₄H₁₀O.   (Hint: Their are just 7 structural isomers possible for this molecular formula- the (CH₃)₂CHOCH₃ isomer's NMR is NOT shown.).

 What is the structure of each compound?  Make a summary table for each give the approximate chemical shift, the number of peaks, number of neighboring protons, and the integration  of the peak.

A  Two overlapping peaks at 1.4 ppm


B

C

D


E


F Two peaks are overlapping  at 3.34 ppm