Question

Can each of the following molecules be identified apart from proton NMR? If so, how would the spectra differ from molecule to molecule? Assign ranges to protons and multiplicities.

Answer 1

& I The I given three molecules having same number of Carbons but have different functional gorrup's So they have different UNMR spectral and identif them by functional group peake C C) CH3 Ca) • (3H) = 100 ppm. ( t) (ii) - chh-(5)- (24) 2:5ppm (a) (11) -CH2-(C) = (1) : 2.5 rpm ( t) (iv) - Chhocd) (211) 1.9 ppon (n.) (V) - Cafe-le) = (31) - Oos ppm (+). i) a (CH) 0.9 ppm (o 1.5 ppm (P) 35 ppm ( 5) 1.8 ppm (9) 1.0 ppm (s cors ppm (+ 52.8 ppm dl), of 9 e ( ib (CH) (iii) C (CH) a f b Uv) a (CH) (V e CCH) (vi) t CH3) (w) 9 01)

c) H е e с C f b (iii) (d) (CH) (iv) (d) CCH) o CQ) ECHO) = 9-10-ppm (+) (ii) Cb) CCH) = 0.5 ppm (9) = 9.8 ppm (P) =1.0 ppm (p) (W) (4) CH) = 0.9 ppm (s) (vi) () (CH) -ous ppm ( t).

example @ to shows, their functional group protons peaks but example 6 only have alkane protors like this the & three examples are having dikterend H NMR spections.