5. The following are the simulated 'H- and 13C-NMR spectral data of 10a-Methyl-1,9,10,10a- tetrahydro-2H-phenanthren-3-one. Please assign...

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5. The following are the simulated 'H- and 13C-NMR spectral data of 10a-Methyl-1,9,10,10a- tetrahydro-2H-phenanthren-3-one. Please assign each signal to the appropriate Proton(s) and Carbon, using the same numbering scheme as given in the structure of the product. 'H-NMR (CDCI3) 6/ppm: 1.26 (singlet, 3H); 1.36 (triplet, 2H); 1.58 (triplet, 2H); 2.55 (triplet, 2H); 2.94 (triplet, 2H); 6.22 (singlet, 1H), 7.03 (triplet of doublets, 1H); 7.07 (doublet of doublets, 1H); 7.09 (triplet of doublets, 1H); 7.25 (doublet of doublets, 1H). Give the expected coupling constant (J) values for each signal/peak. [10] 1°C-NMR (CDCI3) 6/ppm: 21.5; 27.2; 29.9; 38.4; 38.6; 42.4; 111.8; 125.6; 126.0; 127.5; 128.2; 134,7; 137.1; 166.5; and 197.6. [8] 4a 10a [4b 10 8a 8 9 10a-Methyl-1,9,10,10a-tetrahydro- 2H-phenanthren-3-one 3. 5. The following are the simulated 'H- and 13C-NMR spectral data of 10a-Methyl-1,9,10,10a- tetrahydro-2H-phenanthren-3-one. Please assign each signal to the appropriate Proton(s) and Carbon, using the same numbering scheme as given in the structure of the product. 'H-NMR (CDCI3) 6/ppm: 1.26 (singlet, 3H); 1.36 (triplet, 2H); 1.58 (triplet, 2H); 2.55 (triplet, 2H); 2.94 (triplet, 2H); 6.22 (singlet, 1H), 7.03 (triplet of doublets, 1H); 7.07 (doublet of doublets, 1H); 7.09 (triplet of doublets, 1H); 7.25 (doublet of doublets, 1H). Give the expected coupling constant (J) values for each signal/peak. [10] 1°C-NMR (CDCI3) 6/ppm: 21.5; 27.2; 29.9; 38.4; 38.6; 42.4; 111.8; 125.6; 126.0; 127.5; 128.2; 134,7; 137.1; 166.5; and 197.6. [8] 4a 10a [4b 10 8a 8 9 10a-Methyl-1,9,10,10a-tetrahydro- 2H-phenanthren-3-one 3.

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Basic principle of chemical shifts in nmr In 1 Hnmr and 13 Cnmr the chemical shift depends on the surrounding electron density of nmr active nuclei If ... View the full answer