2007-03-10 16:32:14 · 2 answers · asked by wintersun_elyse 1 in Science & Mathematics ➔ Chemistry
In fact Benzaldehyde can reduce Tollen's reagent (s-IL Finer) but nor Fehling's soln Or Benedict's soln.
This is becuse of lower reactivity of aromatic aldehydes.
In contrast to alkyl group in aliphatic aldehyde ,aryl group in aromatic aldehyde shows -I effect, So in case of Aliphatic aldehyde (because of the +I effect of alkyl group) electron density in carbonyl group becomes high & so they can easily loose electrons & get oxidised.
But in case of Benzaldehyde -I effect of aryl group decreases the electron density in carbonyl group causing it to be less susceptible to electron loss & hence oxidation.
So mild oxidising agents like Fehling's soln can't oxidise benzaldehyde.
2007-03-10 22:13:01 · answer #1 · answered by s0u1 reaver 5 · 1⤊ 0⤋
Benzaldehyde With Tollens Reagent
2017-02-24 06:08:28 · answer #2 · answered by pollmann 4 · 0⤊ 0⤋