Question

For the spectrum below, identify the indicated signals and then determine which compound it came from. IDD D 4000 theo ਇਲ 9000 EDO 1000 HRVENUHEERTHI Cut and paste one of the following descriptions to fill in each of the following blanks and identify those bands: sp C-H stretch sp2 C-H stretch sp3 C-H stretch CEO stretch C=C stretch C=N stretch 1º amine N-H stretch 2º amine N-H stretch RO-H stretch RCOO-H stretch CEC stretch CEN stretch benzene overtones Broad signal at 3000 cm-1 strong absorption at 2900 cm-1 sp3 C-H stretch doublet at 1720. 1700 cm-1 The compound is (enter the LETTER ONLY corresponding to one of the compounds below) B. A OH C. OH t D E. F. HO OH NH2 H I. H. H G اس سال اس ام اس OH H

Answer 1

Broad signal at 3000 cm-1: R-OH stretch.

Strong absorption at 2900 cm-1: sp³ C-H stretch.

Doublet at 1720, 1700 cm-1: C=O stretch.

It is compound D), malonic acid (It is noted that it is an acid due to the characteristic shape of the OH band attached to the peak of the C-H stretch, the presence of the C=O band and in this case it is double because is a dicarboxylic acid)