Question

unk # R161 7.133 THE HNMR - 1.753 ** 1.702 CH Рpn

I am struggling to decipher these spectrums, can you help?

Answer 1

¹H NMR Data

7.9 (d, J = 8 Hz, 2H) indicates aromatic protons attached ortho to electron withdrawing group attached to benzene ring

7.25-7.60 (m, 3H) remaining three aromatic protons (mono substituted aromatic ring present)

2.95 (t, 2H) (CH2 group attached to electron withdrawing group)

1.71 (quintet, 2H) (CH2 attached to two CH2)

1.42 (sextet, 2H) (CH2 attached to CH2 and CH3)

0.95 (t, 3H) (CH3 attached to CH2)

¹³C NMR data

200 ppm presence of carbonyl group

136 ppm quaternary aromatic carbon attached to electron withdrawing group

132 ppm Aromatic carbon

128 ppm Aromatic carbon

127 ppm Aromatic carbon

38 ppm Aliphatic carbon attached to carbonyl

26 ppm Aromatic carbon

22 ppm Aromatic carbon

13 ppm Aromatic carbon

IR data

2956 cm-1 Aliphatic chain C-H stretching

1681 cm-1 presence of carbonyl group

1465 cm-1 C=C stretching

1250 cm-1 C=C stretching

All above data indicates following structure

1-phenylpentan-1-one