Orgo question 2

[299678]

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I don't even understand what question asks for

Which aldehyde gives a hydrate in greatest yield?
a) benzaldehyde
b) Formaldehyde
c) Butanedial
d) ethanal
e) propanal

 

[mag7ical]

This is a hydration reaction: aldehyde + water -> hydrate (a diol)

Water readily attacks the least hindered, least substituted aldehyde. This will produce the greatest yield of products. The least substituted compound is b.

 

[krnkimsung]

Correct. Also the electron withdrawing group makes it easier to hydrate which is why Aldehyde yields more Gem-Diol than Ketones. Hope this helps,

This is a hydration reaction: aldehyde + water -> hydrate (a diol)

Water readily attacks the least hindered, least substituted aldehyde. This will produce the greatest yield of products. The least substituted compound is b.

 

[sfoksn]

if talking about electron withdrwaing group, shoudln't the benzaldehyde be most electron deficient, because benzne is a strong electrophile?