(i) Calculate the double bond equivalents (DBE) for each molecule. (ii) Assign the 'H NMR spectra completely, rationalise the number of peaks, relative integral, their multiplicity or splitting pattern where appropriate. (iii) Rationalise the 13C NMR spectra. (iv) Rationalise all numbered peaks in the mass spectra and IR spectra. (v) Provide a brief logical explanation for how you arrived at unambiguous structures for compounds A and B. Problem 88 2114 3295 IR Spectrum diquid fam 2000 1600 v (am) 4000 3000 1200 800 10 Mass Spectrum 52 80 60 No significant UV absorption above 220 nm 20 40 80 120 160 200 240 260 m/e 13C NMR Spectrum (100.0 MHe. CDCI, sciution) DEPT O CH CHt solvent proton decoupied 200 160 120 80 40 8 (ppm) H NMR Spectrum (400 MHz. CDa, cluion Exchanges with Dyo expansion 2H 2H 1H 2H 2H TMS 25 2.0 3 1 8 (ppm) 10 4 2 ed ose