Question

7. The following two reactions proceed through an Su2 mechanism. Determine the likely product for each and match the 1H NMR spectrum below to the product of one of the reactions, Show your assignments for ALL NMR peaks to explain your conclusions ,KcOs OH DMF CHy-l, KCO ON он DMF зн 1H 1H 2H 9 8 5 PPM 0 Зн 2H 2H 2H 0 PРM Page 4

Answer 1

ANSWER- As we know NMR spectroscopy helyes to identify the proton and 13c. - Here in the given Reaction, reaction proceeds through SN² Mechanism than we assumed the product and than identify with HNMR spectrum. -OH K2CO3> IN DMF it SN ON- LOH CH₃ I K2CO3 DMF KI) For 'H NMR spectra - product of Reaction (1) (NMR Figure-2) in given Question) ON a BH H H " In this compound 4 types of protons present a, b, c and a, a, b types protons in Aromatic region and cand a present in aliphatic region.

Assign letter of postonsin Figure No. E pretens Svalue sitting Cppm better a 2H 2H 2H 3H 8.30 24(d) 8. 20 2H & T 4.45 2460) 1.44 344) d-doublet, Q-Quartet > {"> For H NMR spectra- Product of Reaction CNMR Fgure-2 in given Guest ON YyoH Ha b H In this compound four types of protons present in given spectrum a, b, c, and d actually b brotons comes in different s value but sometimes due to a little difference in s values it comes at same area Protons a b & cin aromatic region, and Protons d in aliphatic region Cattached with oxygen)

Assign letter of Protons in Figure No of protons Splitting pattern Svalue (ppm) 8.90 8:43 ІН 5 2H TH 7.67 3H 4.00 s-singlet, &- doublet