Question

Propose a structure based on the following IR and MS spectra, and assign the respective signals or fragments

Question 18: Propose a structure based on the following IR and MS spectra, and assign the respective signals or fragments. (18 pts). (You can draw on the top of spectra or use a separate paper if necessary). A) (9 pts) 0681-5 -3032 >-2924 >-2862 % Transmittance -1072 --1011 — -1489 4000 3000 1000 Wavenumbers (cm) 200 917 1727 % of Base Peak 170 397 507 507 LIK 757 l 50 100 TTT 150

Answer 1

m imi2 1:1 = bromine present. IR: 802cml para on benzene substitution m/2=91 Elto IR: 3032cmt 2924 cmt sp² c-h sp3 ch stretch stretch.