Question

CsH1002 20 0 200 180 CD9-04-222 160 140 120 100 80 60 40 ppm (There are two peaks just above 20 ppm) 11 10 9 8 7 6 5 4 3 2 i Ppm septet ІН singlet doublet 3H 6H

Determine the structure of the following unknowns

Answer 1

Following the charts given and analysing the data derived from the chart the structured has been determined. Steps and explanation is given in the images below.

formula = CGH1002 The molecular double bond Equivalent is = c - H+1 where ca no. of carbon atoms = 5 + 1 - 10 Ha no. of Hydrogen atoms so there is only one double bond in this molecule, and suggests that the structure is aliphatic. The 13C NMR data are 170 ppm, 70 ppm, 20 ppon → shown in the graph which is suggestive of the following → Peak at 170ppm suggests presence of & group. suggests presence of CH3 - croor Peak at 20 Ятоuр. & Peak at presence of 70 ppm suggests group. - CH2 -o-g

The following peaks are obtained from the 'HNMR . CHS 5ppm septet, IH suggestive of chets -ch group, appom, "It, singlet suggestive of che group 1ppm, '6t² doublet in similar enuronment attached to only one suggestive of two cty group and the nearby carbon reyderogen. the structure is as all the data, From follows City-c o -cH ctia