NMR questions
No description yet. This curated deck is ready for daily study.
Card preview (1)
The relative integration values for the NMR peaks are shown on Figure 2. Deduce the structure of compound R by analysing Figure 1 and Figure 2. Explain each stage in your deductions. Use Table A and Table B on the Data Sheet. question 3 https://drjwinters.weebly.com/uploads/2/9/0/7/29079717/nmr_a2_1.pdf
Absorption at 3360 cm–1 shows OH alcohol present There are 4 peaks which indicates 4 different environments of hydrogen Maximum of 6 marks if no structure given OR if coherent logic not displayed in the explanations of how two of OH, CH3 and CH2CH3 are identified. M2 1 The integration ratio = 1.6 : 0.4 : 1.2 : 2.4 The simplest whole number ratio is 4 : 1 : 3 : 6 M3 1 The singlet (integ 1) must be caused by H in OH alcohol M4 1 The singlet (integ 3) must be due to a CH3 group with no adjacent H M5 1 Quartet + triplet suggest CH2CH3 group M6 1 Integration 4 and integration 6 indicates two equivalent CH2CH3 groups Last mark is drawing it out