Question

For each set of spectral data, propose an acceptable structure that is consistent with the data. (Please answer all)

13C NMR: δ 67.29(C), 34.46(CH.) ppm MS: M+ m/z = 70 IR: 3070, 2960, 2870, 1666 cm "C NMR: δ 138.92(t), 1 1426(d), 35.96(t), 22.17(), 13.59(q) ppm e. f. m/z = 72 MS:N「 IR: 2960, 2870 cm "C NMR: δ 31.68(t), 29.80(d), 22.20(), 1 1.6%) ppm MS:M+ IR: 2960, 2870, 1734 cm "C NMR: δ 220.16(C), 38.30(CH'), 23.24(CHz) ppm g. m/z=84 m/z = 138, (M : M+2 = 1 : 1) MS: M+ IR: 3010 (broad) 1715 cm "C NMR: δ 173.61 (s), 25.21 (t) ppm h. MS: M+ m/z = 88 IR: 2960, 2870, 1736 cm "C NMR: δ 170.95(C), 60.34(CH), 20.98(CH), 14.23(CH.) ppm i. m/z = 73 MS:M+ IR: 3410, 2960, 2870, 1668 cm "C NMR: δ 171 .27(C), 26.26(CFL) 22.87(CH) ppm j. 46