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![[Post New]](/templates/default/images/icon_minipost_new.gif) 18 Jul 2007 22:48:42 IST
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Hi! could anybody pleaseeeeeeeee explain how to find double bond equivalents for C13H10BrNS C3H8N+
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" From ashes a fire shall be woken From shadows a light shall spring " ---Tolkien
" Throughout the centuries there were men who took first steps down new roads armed with nothing but their own vision. " --- Ayn Rand
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19 Jul 2007 11:26:07 IST
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sorry! should have posted it in organic chemistry. somebody please ans u will defenitely get rated
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" From ashes a fire shall be woken From shadows a light shall spring " ---Tolkien
" Throughout the centuries there were men who took first steps down new roads armed with nothing but their own vision. " --- Ayn Rand
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hi nithy!!
to find double bond eq:
1) replace Br as H (halides r equi to H in terms of bonds to C reqd)
2)N by .5 C
3)n jus remove S or O as it is (as it does not effect no of double bonds)
the resultant comp will be: C13.5H11
when dere r no double bonds in a hypothetical compound wid 13.5 carbon atoms then no of H atoms r=29
diff of H atoms=18
no. of double bonds=18/2=9
henc the ans is 9
do rate me if it was helpful
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IIT JEE -2007 FRESHY
JOINING IN WID CHEM ENGG BTECH
IIT ROORKEE
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19 Jul 2007 13:51:01 IST
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Let there be any compound of the form CaHbXcNdOe then the double bond equivalent is written as ( a + 1 ) - ( b + c - d ) / 2. The double bond equivalent does not depend on the oxygens. 1 dbeq = 1 double bond = 1 ring. If dbeq >= 4 then the compound is benzene or it's derivative
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19 Jul 2007 14:35:53 IST
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I am very confused!!!!! why should u replace N by 1.5C?? why doen't O affect double bond???? i don't get the ans by Joyfrancis's method. somebody help! and also ans Q2
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" From ashes a fire shall be woken From shadows a light shall spring " ---Tolkien
" Throughout the centuries there were men who took first steps down new roads armed with nothing but their own vision. " --- Ayn Rand
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19 Jul 2007 17:54:01 IST
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sry yaar did 1 mistake:
N shud be replaced by half a carbon atom
so i have edited my previous reply........
reason: in an org comp if we want to insert a N atom inside (ie the N shud not be at the end of the chain) its chain then no of H atoms reqd is 1 (ie half of 2) n dat for C is 2
no of S atom is equi to 0 carbon atom coz if we wanna insert it in the org comp chain then the no of H atom reqd is 0 .
do rate me if it was helpful
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IIT JEE -2007 FRESHY
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IIT ROORKEE
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