It seems that the question is missing the necessary data. The complete question is provided below
Question:
On the basis of the molecular formula, 1H NMR data, and IR data provided, propose a consistent structure.
C₂H₃Cl₃
¹H NMR data: δ 3.95 (d,2H), 5.77 (t,1H)
IR data: 2950 cm⁻¹, and several peaks below 820 cm⁻¹.
Draw your proposed structure below
Answer:
The proposed structure is attached (please see the figure in attachment)
Step-by-step explanation:
The molecular formula provided us with the necessary data of the number of each atom
The ¹H NMR data show that one carbon atom has two hydrogen atoms while the other has a single hydrogen atom attached to it. The multiplicity of the peak both peak tells that they are next to each other. A doublet (d) is caused by the single hydrogen atom while triplet is due to the two hydrogen atoms. Further, the chemical shifts of both peaks are more deshielded than the peaks usually obtained from alkyl protons (around 1 ppm) suggesting that both are attached to an electronegative atom, in this case, Cl. Also, one peak is more deshielded (δ 5.77) than the other (δ 3.95) which infers that it is connected to two chlorine atoms. All this data predicts the structure provided in the attachment.
The IR data further confirms the structure predicted from the NMR data. It gives absorbance at 2950 cm⁻¹, which is the reported stretching (C-H) peak of methylene (CH₂). The peaks below 820 cm⁻¹ are assigned to stretching vibrations of haloalkanes, here it is C-Cl.