Chapter 3, Problem 2P

Part VII. The H-NMR of a compound with molecular formula C5 H 10 O2 is given below. Find the following: (a) The no. of protons corresponding to each signal in the spectra (6) Give the structure of the compound and assign the signals to each proton in the compound. a 70.2 Integration Values C5H10O2 b 47.7 C 46.5 d 69.5 3.6 3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0 Chemical Shift (ppm) 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8

Part 111. 1 H-NMR spectrum of a compound with integration values in red is given below. Answer the following: (a) write the signals in the 'H-NMR spectrum to the corresponding protons on the structure of the molecule below. (b) Identify the theoretical multiplicities for each proton in the compound. Also give the possible. complex splitting patterns assuming J values are not similar. там Br 22 2 3 6 4 7.2 7.0 6.8 6.6 6.4 6.2 6.0 5.8 5.6 5.4 5.2 5.0 4.8 4.6 4.4 4.2 4.0 3.8 3.6 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0 Chemical Shift (ppm) ra. Br 2 3 6 6 2.5 2.4 2.3 2.2 2.1 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 Chemical Shift (ppm) 2 2 Br 7.3 7.2 7.1 7.0 6.9 6.7 6.6 6.5 6.4 6.3 6.2 6.1 6.0 Chemical Shift (ppm) 5.9 5.8 5.7 5.5 5.4 5.3 5.2 5.0 4.9

1600° 1538°C 1493°C In the diagram, the letter L indicates that it is a liquid. Indicate its components in the upper region where only L is indicated. The iron-iron carbide phase diagram. Temperature (°C) 1400 8 1394°C y+L 1200 2.14 y, Austenite 10000 912°C 800a 0.76 0.022 600 400 (Fe) a, Ferrite Composition (at% C) 15 1147°C a + Fe3C 2 3 Composition (wt% C) L 2500 4.30 2000 y + Fe3C 727°C 1500 Cementite (Fe3C) 1000 4 5 6 6.70 Temperature (°F)