Write the structure of the hemiacetals that results from the following reactions:

Question

1)2-butanone + 1-propanol
2)butanal + isopropylalcohol

I got this for #1: CH2-C-OCH2CH2CH3 with an OH on the single C and the CH2CH3 on the single C. I don't know how to do the second one. I don't really understand the iso molecules. Could someone please tell me if #1 is correct and help me with #2?

Answer 1

Start with:

CH3CH2CH2-C-OCH(CH3)2

To the middle -C-, attach an -OH (up) and an -H (down).

See also:
http://en.wikipedia.org/wiki/Hemiacetal