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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: few organic doubts................
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lokeshsardana (685)

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Q1) which is more stable?
 
CH2-COCH3   OR   CH2-CHO  and why??
 
Q2)Arrange in increasing order of stability
 
    :CH2  ,  :CF2   ,  :CCl2     
 
If these are
 
i) all singlet
 
ii) all triplet ????
 
 
Q3)Which of these will have highest dipole moment?
 
i) CHCl3  ii) CH2Cl2  iii) CH3Cl   iv) CCl4  ???
 
 

LOKESH SARDANA,
department of Production and Industrial engineering,
Indian Institute of Technology,Roorkee.


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svj29 (2140)

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Q.3 CH2Cl2 > CH3Cl > CHCl3 > CCl4

itz an exception dude...cannot do much about it...

PROGRESS ISN'T MADE BY EARLY RISERS OR HARD WORKERS, BUT BY LAZY PEOPLE TRYING TO FIND EASIER WAY TO DO THE SAME.....SO BE LAZZZZYY!!!!
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lokeshsardana (685)

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yup!!!!!!!!!! I also think so.............

but in book its given CH3Cl > CH2Cl2

So, I m confused.......

LOKESH SARDANA,
department of Production and Industrial engineering,
Indian Institute of Technology,Roorkee.


Happiness can be found, even in the darkest of times, if one only remembers to turn on the light.
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-- Albert Einstein

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dev_22oct (1384)

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ketones are stable due to steric and inductive factor.

Devendra Kumar Shukla
M.Sc physical Chemistry
Currently working in Daswani classes
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lokeshsardana (685)

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dev sir, pls xplain in detail .......how steric and inductive factor cause ketonic anion to be more stable than aldehydic anion........

LOKESH SARDANA,
department of Production and Industrial engineering,
Indian Institute of Technology,Roorkee.


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lokeshsardana (685)

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still waiting 4 reply ...........

pls help!!!!!

LOKESH SARDANA,
department of Production and Industrial engineering,
Indian Institute of Technology,Roorkee.


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-- Albert Einstein

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iberis22 (575)

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The order is CH3Cl (1.87D)  > CH2 Cl2 (1.54D) > CHCl3 (1.02 D) > CCl4 (0 D)
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lokeshsardana (685)

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ma'am.......

if we don't go for data.......and visualise its structure......(vich is tetrahedral)

then it comes out to be........

CH2Cl2 > CHCl3 = CH3Cl

and ofcourse CCl4 = 0........

then how this deviation arise??????


LOKESH SARDANA,
department of Production and Industrial engineering,
Indian Institute of Technology,Roorkee.


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-- Albert Einstein

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iberis22 (575)

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Chlorine
 
Hydrogen
 
Net Dipole
 
1. CH3Cl = 1.87
 
ch3cl-dp.gif (1153 bytes)
2. CH2Cl2  = 1.54
 
ch2cl2-dp.gif (1447 bytes)
3. CHCl3  = 1.02
chcl3-dp.gif (1390 bytes)
 
4. CCl4  = 0
ccl4-dp.gif (1142 bytes)
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iberis22 (575)

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The effect of Cl will be more prominent than H becoz H is the smallest of them(even if there are 3H present).
 
Did you get it???
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lokeshsardana (685)

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ma'am..............don't u think dipole moment of CHCl3 should be equal tothat of CH3Cl

LOKESH SARDANA,
department of Production and Industrial engineering,
Indian Institute of Technology,Roorkee.


Happiness can be found, even in the darkest of times, if one only remembers to turn on the light.
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-- Albert Einstein

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lokeshsardana (685)

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I mean both having dipole moment = dipole moment of a single C-H bond + dipole moment of a single C-Cl bond.

LOKESH SARDANA,
department of Production and Industrial engineering,
Indian Institute of Technology,Roorkee.


Happiness can be found, even in the darkest of times, if one only remembers to turn on the light.
Albus Dumbledore
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There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.
-- Albert Einstein

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lokeshsardana (685)

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and ma'am, I think direction of dipole moment is from -ve to +ve .

and in ur structures its from +ve to -ve......

and also, I think u have neglected dipole moments of C-H bonds....




LOKESH SARDANA,
department of Production and Industrial engineering,
Indian Institute of Technology,Roorkee.


Happiness can be found, even in the darkest of times, if one only remembers to turn on the light.
Albus Dumbledore
Harry Potter and the Prisoner of Azkaban movie


There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.
-- Albert Einstein

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