Homework Answers
The given molecule is cis-1,2,3,6-Tetrahydrophthalic anhydride. This is well known studied molecule.
(IUPAC: (3aR,7aS)-3a,4,7,7a-Tetrahydro-2-benzofuran-1,3-dione)
Shift ------------- splitting --------------- coupling (in Hz) ----------------- integration ----------------- Assignment
6.0 ppm -------- ddd ----------------------10.3, 2.4, 1.9 --------------------- 2H ------------------------------- HA
2.4 ppm -------- ddd ---------------------- 14.1, 9.8, 2.4 -------------------- 2H --------------------------------HB
2.3 ppm -------- ddd ---------------------- 14.1, 4.3, 1.9 -------------------- 2H --------------------------------HB'
3.8 ppm -------- ddd ------------------------ 9.8, 8.1, 4.3 -------------------- 2H --------------------------------HC
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