ochem qs.

[gomawum]

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1.
View attachment a.jpg

I got the answer right, but was ambiguous b/t a,c
(I think there would be two product which is a and c, sine they both can be the nucleophile, c)
how I see it is 1' bromide is good leaving group, and -OR is strong base, not sterically hindered, so it's SN2, but what role does T-buoh have in this case?



2. O-H, C-(triple bond)-C, C=C, C-C
which has longer bond lenth?
triple is smaller than double which is smaller than mono,
but when compared to O-H, which is smaller?



3.View attachment b.jpg

I see both b and c as product, but what do u see here to distinguish main product?



4. comparing ethyl-NH2 and Ethyl-OH, which one has higher boiling point?

I see H-bond is strong F>O>N
but Nitrogen in this case can make two H-bond whereas O with one,
so which one?

 

[CookieDough]

Just a few answers to some of your questions:

#2. C-C has the longer bond length. I believe the bond length of O-H is even shorter than that of triple bond C.

#4. Amines have lower BPs than alcohols. This is because N is not as electronegative as O so the hydrogen bonding of amines are not as strong as those of compounds including O's, regardless of the number of H's on N.

 

[MaruHyun]

1. It's there to indicate that the rxn is in Basic solution.