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Chemistry: Post your doubts here!

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PhyZac

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In the syllabus it is written explain the terms bond energy, bond length and bond polarity and use them to compare the reactivities of covalent bonds.

My doubt is, what does bond polarity do to covalent bond, like how does it affect it?
 
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PhyZac said:
In the syllabus it is written explain the terms bond energy, bond length and bond polarity and use them to compare the reactivities of covalent bonds.

My doubt is, what does bond polarity do to covalent bond, like how does it affect it?
Click to expand...
bond polarity means what is the EN value difference of the bond . this will dictate bond strength and mp bp
 
asd

asd

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If we are to react CH3CH2CH=CH2 with Hot KMnO4, we'd get a carboxylic acid and CO2, right?
 
Mohsin41

Mohsin41

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Hello friends,
I have collected very usefull AS chenistry notes which are very easy to understand and revise. I have tried many times but due to large file size its not uploading here. If any one of you want topic or chapter notes you can contact me at [email protected]

REGARDS and good luck for paper2 on 8th may.
 

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aalmuhannadi

aalmuhannadi

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asd said:
But we use an acid in both the reactions, and the reaction is initiated by an H(with a slightly positive charge) atom attached to the acid. Will this, then, not be an electrophilic reaction?
Or is it that only addition/substitution reactions can be electrophilic or nucleophilic, and elimination can not be?
If so, reason please. :D
Cause we're still using an acid where the H atom can be considered as an electrophile.
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I think the reason is that, firstly, yes the only types of electrophilic reactions (as far as I know) are addition and substitution. Secondly, I'll write an example of an elimination reaction with an alcohol:

CH3CH2CH2OH > CH3CH=CH2 + H2O , I took this from a book and clearly the concentrated H2SO4 isn't included as a reactant, so my logical explanation would be that the acid acts as a catalyst in this reaction.
 
asd

asd

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aalmuhannadi said:
I think the reason is that, firstly, yes the only types of electrophilic reactions (as far as I know) are addition and substitution. Secondly, I'll write an example of an elimination reaction with an alcohol:

CH3CH2CH2OH > CH3CH=CH2 + H2O , I took this from a book and clearly the concentrated H2SO4 isn't included as a reactant, so my logical explanation would be that the acid acts as a catalyst in this reaction.
Click to expand...
Well Look here: http://www.docbrown.info/page06/OrgMechs1b.htm#catalysed
 
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aleezay

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PhyZac said:
In the syllabus it is written explain the terms bond energy, bond length and bond polarity and use them to compare the reactivities of covalent bonds.

My doubt is, what does bond polarity do to covalent bond, like how does it affect it?
Click to expand...
I think it makes a covalent bond stronger. And it makes a covalent compound more reactive..
 
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