Question

I need help with the answers but also with the explanation and how to get there

Draw and name all of the structural isomers that are ketones with five carbon atoms in 26. its longest chain and the molecular formula CHO. Can this molecular formula also have an aldehyde structure? If so, illustrate and name the aldehyde. Can this be drawn as an ether? Explain. (6 marks) Write chemical equations for the synthesis of 2-pentanol from an alkene. Use structural formulas for each organic compound. (3 marks) 27. 28 The compounds 1-propanol and propanone have approximately the same molar mass. Based on differences in their intermolecular forces, rank these compounds in order of increasing boiling point. Justify your prediction. (3 marks)

Answer 1

26) Degree of unsaturation = C-H/2+1 = 5-10/2 +1 = 1

So, only one double bond is present and cyclic ring is not present.

Possible ketones are :

ir cs2-pentanone CamScanner 3-pentanone

Yes, aldehyde is also possible with this formula. Structure of aldehyde is :

No pentanal

Yes, ether is also possible. But that also contain atleast a double bond because degree of unsaturation is one.

27) Pent-2-ene on hydration give pentan-2-ol.

H, OH فیلم H0 115 111111 OH یک

28) 1-propanol has high boiling point due to strong H-BONDING whereas propanone has dipole-dipole interaction which is weaker than H-BONDING.