Question

Aldehyde: ZPA

Ketone: BCK

Amount of material started with: 2 mL of aldehyde and 0.5 mL of Ketone

Recrystallized Mass: 1.53 g

Melting Range: 196-200 C

Recrystallization Solvent: 9:1 Ethanol/Acetone

Aldehydes ketones Cyclopentanone Cyclohexanone Acetone Benzaldehyde p-tolualdehyde p-anisaldehyde Cinnamaldehyde 113 °C 175 °C 129-130 C 144 °C 189 °C 235-236 °C 212 °C 225 °C 118°C 170 °C 159 °C 180°C 4-methyl cyclohexanone 98-99 °C 113-113.5 °C 141-142 °C 163-164 °C

Answer 1

Ans) Given Data is, Aldehyde :ZPA Ketone! Bck Amount of material started with : ami q aldehyde and 0.5 mL of ketone. Mass: 1.539 Recoystalised Mass : melting Range 196- 20000 Recrystalisation solvent : 4:1 Ethanol : Acetone. CHO Bck oMe (cyclopentanone) ZPA ly-methoxy benzaldehyde

IR of ketone (BCK); At 2966cm-1 is C-H streching recurrence of sp3 Carbon (CH2). At 1747 is sharp streching recurrence of C=O. At 1408 is medium bowing of methylene bunch which is CH2. So it affirms that the atom has CH2 gathering.

IR of aldhehyde;At 3076cm-1 is streching recurrence of C-H of benzene ring. At 2904cm-1 us streching recurrence of C-H of OCH3. At 1700cm-1 is streching recurrence of C=O.

--> At 3.1ppm is singlet of 4 Hc. Upfield in light of the fact that these are protected protons. At 3.88ppm is singlet of 6Hd proton.

NMR :- Нь о 4K Но OCH₃ Мъ Я не Ha Hс но нь ОСН3 а d Ha 1

--> It is legitimately connected to oxygen particle so deshielded. At 7.0ppm is doublet of 4Ha proton.

--> Doublet because of Hb. At 7.58-7.6ppm is multiplet of 6 proton which are Hb proton. They show compound move in this range.

--> This is the main structure on the grounds that in rest aldhehyde OCH3 gathering.

--> No one but OCH3 can show singlet of 6Hydrogen in scope of 3.7-4.0ppm. Likewise for other ketone the quantity of protons doesn't coordinate in aliphatic area.

Thank you

Please rate