Question: Draw the structural formula from the spectroscopic data given below. In each case show how the fragmentation analysis. (i) Mass Spectrum (m/z) 148 (M+); 120

Draw the structural formula from the spectroscopic data given below. In each case show how the fragmentation analysis.
(i)
Mass Spectrum (m/z)
148 (M+); 120 (M-28); 105 (M-43); 77 (M-71)
IR (cm-1)
3060; 2874, 2962; 1680; 1450
1H NMR (ppm)
7.75 (d) ; 7.55 (t); 7.47 (t); 2.95 (t); 1.79 (sextet); 1.00 (t)
13C NMR (ppm)
200.4;137.0; 132.8; 128.0, 128.5; 40.4; 17.7; 13.8

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