I couldn\'t get the last part of the problem! Compound D has a molecular formula

Question

I couldn't get the last part of the problem!

Compound D has a molecular formula of C6H1202. What is the Unsaturation Number (UN) or Double-Bond Equivalent (DBE)? Examine the IR spectrum provided for Compound D. Consider the peaks at 3000 and 1750 cm and check the types of bonds they represent in the molecule: O-H or N-H C-H (sp3) C-H (sp2) C-H (sp) C=O Based on the molecular formula, the UN/DBE you calculated, and the IR spectrum, check all the functional groups that could be present in compound D? benzene ring ester amine nitrile ring carboxylic acid alkene alkyne ketone ether alcohol aldehyc1e epoxide

Explanation / Answer

Molecular formula is C6H12O2

DBE = 1

IR values 3000 cm-1 corresponding to C-H (sp3) and 1750 cm-1 corresponding to C=O (carbonyl group of ester)

Since there is no nitrogen the molecule doesn't contain amine or nitrile group. Since the DBE is only 1 there is no benzene ring. From the IR data, the molecule must contain an ester group.

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