Inductive Effect Examples (Part - 29) - Organic Chemistry: Some Basic Principals & Techniques Video Lecture - Class 11

hello friends this meeting on organic
chemistry music spa 29 is brought to you
by exam viacom normally for exam the
question is which bond is more woollen
in the following pairs first is CS 3h
and CSTB are so let's see this so I have
CH 3 H and CH 3 we are so here is the
difference in electronegativity between
carbon hydrogen is not that much but the
carbon bromine you have I mean the
aerobic is more electronegative and the
difference is more so you will see an
inductive effect here and blue maybe
will get a slightly negatively charged
carbon give a slightly positive charge
so in this case this bond is more polar
correct let's take this a ch3 in a ch2
and ch3 here also H you see
oxygen has is more electronegative than
carbon right
so if you see nitrogen the
electronegativity is 3.0 for oxygen
right here it is 3.4 for a carbon we
know is almost to 0.55 so in this case
if you see the difference is more right
so this will have more negative charge
in slamball positive so this will be
more further sorry similarly here also
if you see carbon is what to 0.55
hydrogen was 2.20 here carbon is 2.5
here and bromine here is what bromine is
2.96
really the difference is more right to
0.55 in the point so it is more polar
here also carbon oxygen the difference
is more so it is more polar as you
compare to carbon nitrogen one correct
same thing with this guy
ch3oh n CH 3 sh so here if you see four
sulfur the electronegativity is two
point five carbon is what
point five five here also it is two
point five five carbon and oxygen is 3.4
for these values because from the
electronegativity chart so if you see
the difference is morally right so this
is more polar all right 62.5 by 3.0 for
the difference is almost point mine and
here the references points Italy very
very less so this way is less polar this
guy is mobile hope you understand so the
only thing you have to do is with carbon
you define the other atom if I need to
find the difference in the
electronegativity the one which has
maximum difference in electronegativity
is the one which is both would correct
let's take an example so in which of
this CC bond the inductive effect is
expected to be yeast so I have this kind
of structure ch3 ch2 ch2 in here as I
told BR is more electronegative than
carbon bromine has the electronegativity
of two point nine six this carbon has
electronegativity 0.55 so blowing the
track electron the world itself they
love slightly negative shock slightly
positive shot this will get all the more
less positive charge within all the moon
less positive charge right that's what
is in your key effect the effect
decreases as we book in this direction
away from this electronegative element
so this carbon is expected to have the
least electronegative correct this cup
least inductive itself
let's take an example which of the two
in expecting to be more steak so let's
draw this this guy is going to wear
cht-cht oh - and this guy is cht-cht
always correct so now let's let's find
the elect electronegative nitrogen is
what 3.0 carbon I know it is 0.55 here
both are same both carbon so we don't
need to find electronegativity here and
here in this case carbon oxygen this
carbon is 12.5 right in here it is three
points right so if you see if I toned
this carbon this mitogen is more later
on eight in this carbons way to try to
pull electrons towards itself right so
let's see negative effect in this
direction correct in this case I have a
methyl group and I have also told
methanol has plus I effect and it will
try to add lectrons over time inductive
in this direction also you see the
carbon oxygen here it will have in a PFF
in this direction correct
so in this case this another groom is
taking electron from this Oh - right so
it was negative so another group is
making it less nearly correct
so it's trying to localize the electron
and this guy here my cqh PI group is
making it this for - more than right
because this guy methyl group now has
the tendency to give electron plus -
this is - I - this is plus I she resumed
is there system
correct
so since in this case my this no.2 group
making this less negative it is trying
to stabilize the charge so since this
charge is stabilized this is more stable
won't stay so in this case all the
charges here it was negative Plus this
methyl group or thyroid let me heat all
the more negative the charge will both
concentrate in this oxygen so it becomes
unstable or less still move in return so
in this case a negative charge whatever
oxygen was this was taken away by this
anode this becomes less negative so it
is okay in this case it was negative
Oh minus plus the tiny blue boy the help
of here and more negative charge here so
all the morning it is very very negative
this is very very negative this is
pokedex negative this is very very
negative so it is less take right thank
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