### Educational Resource: Understanding the ¹H NMR Spectra of Formaldehyde#### Exercise:1. **Given the following ¹H NMR spectra.** - **A.** Draw the structure of the compound. - **B.** Label peaks (Hₐ, H_b, H_c, etc.) and indicate multiplicity for Formaldehyde.#### Description of Graph:- The spectrum displays a typical ¹H NMR plot with the horizontal axis representing chemical shifts in parts per million (ppm), ranging from 10 ppm to 0 ppm.- The vertical axis depicts the intensity of the signal.- In the provided spectra, there are no specific peaks shown, but in a typical spectrum for formaldehyde, you would expect a singlet around 9-10 ppm, which corresponds to the protons in formaldehyde.#### Background on Formaldehyde:Formaldehyde (CH₂O) is the simplest form of aldehydes. It is primarily identified in ¹H NMR by its distinct peak, resulting from the protons attached to the carbonyl carbon.---This exercise will help you understand how to interpret simple NMR spectra by identifying and labeling the peaks corresponding to different hydrogen environments in a given compound.

The NMR spectrum provides the following details about the structure of the molecules: The number of signals: The number of signals gives information about the different types of hydrogen atoms. Position of signal: The position of the signal tells us about the electronic environment of hydrogen. splitting of signal: Splitting of the signal tells us about the number of neighboring hydrogen atom present. If the number of the neighboring hydrogen atom is n then the signal split in (n+1) peak. Area of signal: The area of the signal provides information about the number of hydrogen atoms responsible for the signal.The NMR spectrum of the compound shows a singlet at 9.6 ppm. It confirms that the molecules have only one type of hydrogen atom. The value of the chemical shift (9.6 ppm ) suggests that the hydrogen atom attached to the carbonyl group. Hence the structure of the compound is as follows: Or we can draw as follows:Analysis of NMR spectra: The signal is singlet due to the two hydrogen atoms of formaldehyde. Both hydrogen atom of formaldehyde has the same chemical environment hence they give singlet. Number of peak = one (Ha) Multiplicity = singlet