The Student Room Group

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Reply 1

in chemistry?

Reply 2

yep

Reply 3

Dan_Crew
yep


To be literal, 'Breaking of' i think, dont hold me to it!

Reply 4

George-W-Duck
To be literal, 'Breaking of' i think, dont hold me to it!

i think so too, although ive never heard it used (i did edexcel).

Reply 5

oh come on people...standards of chemistry !!

Bond Fission is the breaking of a covalent bond !!

Reply 6

xskater
oh come on people...standards of chemistry !!

Bond Fission is the breaking of a covalent bond !!


Ok so what wuld this be:

The type of bond fission of the Cl-Cl bond in the reaction between Cl2 and methane??

Reply 7

Dan_Crew
Ok so what wuld this be:

The type of bond fission of the Cl-Cl bond in the reaction between Cl2 and methane??


heterolytic, it forms two species that are the same (two cl free radicals

Reply 8

Heterolytic bond fission is when you are breaking a bond with the two elements are different. e.g C - H

Homolytic bond fission is when you are breaking a bond with the same elements. Cl - Cl

Reply 9

George-W-Duck
heterolytic, it forms two species that are the same (two cl free radicals


homolytic even!

Reply 10

I thought heterolytic fission was where one electron from the double bond went to seperate atoms, and homolytic was where both atoms go to one atom. So heterolytic would be:

Cl(2) --(UV)--> 2Cl* (chlorine radicals)

Reply 11

George-W-Duck
heterolytic, it forms two species that are the same (two cl free radicals

nooooo, if its free radicals its homolytic fission, think homo - same, hetro - different

Reply 12

homolytic bond fission. Thus chlorine radicals will be produced.

Homolytic fissions mean when a bond breaks and free radicals are produced (by one electron going to each chlorine atom), thus in this case chlorine radicals will be produced.

Reply 13

George-W-Duck
homolytic even!


i apologise, past my bedtime!

Reply 14

mik1a
I thought heterolytic fission was where one electron from the double bond went to seperate atoms, and homolytic was where both atoms go to one atom. So heterolytic would be:

Cl(2) --(UV)--> 2Cl* (chlorine radicals)

homolytic just means it produces two identical spieces like Cl free radicals, whereas hetrolytic fisson would be to Cl+ Cl-, ie two different spieces

Reply 15

ok..a lot of people are getting confused here....
if in doubt...think about what is happening

when the bond breaks who gets the electrons...in CL2...both chlorines will attract the electrons the same..thus 2 free radicals

in a H - CL bond the chlorine will get all the electrons thus a negative ion and the hydrogen will be a postive ion

Reply 16

xskater
ok..a lot of people are getting confused here....
if in doubt...think about what is happening

when the bond breaks who gets the electrons...in CL2...both chlorines will attract the electrons the same..thus 2 free radicals

in a H - CL bond the chlorine will get all the electrons thus a negative ion and the hydrogen will be a postive ion

Yes, it was just George w duck confusing things by saying them the wrong way around.

Reply 17

So the answer to my orginal question is???

Reply 18

Dan_Crew
So the answer to my orginal question is???

Breaking of covalent bonds

Reply 19

Dan_Crew
Ok so what wuld this be:

The type of bond fission of the Cl-Cl bond in the reaction between Cl2 and methane??


Sorry i ment wants answer to this?