I
iTeachChem•5mo ago
Gamertug

Organic , Isomers

there was a question for counting no of structures , she counted both trans as seprate , why? both trans are the same if one is up and other is down why does it matter both groups are the same
No description
38 Replies
iTeachChem Helper
iTeachChem Helper•5mo ago
@Dexter
iTeachChem Helper
iTeachChem Helper•5mo ago
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.
Opt
Opt•5mo ago
The groups on carbons can be diff
Sephrina
Sephrina•5mo ago
no stereo matters
Gamertug
GamertugOP•5mo ago
they arnt in the question those are CH3
Sephrina
Sephrina•5mo ago
when there are different structures possible in the compund for stereo
Gamertug
GamertugOP•5mo ago
there should only be 2 , Cis and Trans why 2 in trans both trans are same here there are total 3
Sephrina
Sephrina•5mo ago
see the spaatial orentation the wedge and dash
Gamertug
GamertugOP•5mo ago
why does it matter , the molecule looks symmetric to me , which is wedge which is dash why would it matter
Opt
Opt•5mo ago
Just a moment. Why are there only three bonds on each carbon? Or is the hydrogen implied?
Gamertug
GamertugOP•5mo ago
they both the first carbon from O
Sephrina
Sephrina•5mo ago
in cis there is either only dash and dash or wedge and wedge so thts one
Gamertug
GamertugOP•5mo ago
hydrogen implied
Sephrina
Sephrina•5mo ago
cuz its 2d to you but its actually 3d wedge and dash matters in spatial orentation
Gamertug
GamertugOP•5mo ago
pretty sure oxygen and carbons in same plane
Opt
Opt•5mo ago
They're identical unless the carbons are unique then. Yup
Gamertug
GamertugOP•5mo ago
there was no specification , do i send question
Sephrina
Sephrina•5mo ago
yeah
Opt
Opt•5mo ago
Wait a sec Ok, they're unique.
Gamertug
GamertugOP•5mo ago
No description
Opt
Opt•5mo ago
You can think about flipping the compound It won't give the other one
Gamertug
GamertugOP•5mo ago
still , if one CH3 is above plane and other is Behind Plane why would it matter
Opt
Opt•5mo ago
Because the RS config is different Check that, I think it'll be the opposite Absolute config when you're not sure
Gamertug
GamertugOP•5mo ago
wait lemme check RS
Sephrina
Sephrina•5mo ago
uhm u can think like this that in the explatation given it is that in cis try to think as 3d the wedge is atom towards u and dash is away so its either both towards u or both away so thts one compound and in trans there are right left atleration of wedge and dash so two differnt compounds im sure u know about chiral and non chiral the whole mirroring thingy so think using that
Gamertug
GamertugOP•5mo ago
i forgot how to conver it to that form where we apply CIP rule 💀 can u explain
Opt
Opt•5mo ago
I'll take the first trans compound to explain. Priority order is O > C-O > CH3 > H Anticlockwise, and H is on away bond so S
Gamertug
GamertugOP•5mo ago
wait am asking how did u decide where to place which compound
Opt
Opt•5mo ago
Mass order
Gamertug
GamertugOP•5mo ago
most massive at top then right then bottom then left?
Imine
Imine•5mo ago
so in the trans one...first is S,S And second is R,R right and cis will have R,s and S,R
Gamertug
GamertugOP•5mo ago
ye
sans
sans•5mo ago
They're enantiomers
Gamertug
GamertugOP•5mo ago
ye but like in both methyl group out of plane its basically the same thing if one methyl is above plane and other is below plane its symmetric thats my doubt
sans
sans•5mo ago
It is mirror image If a compound has no plane of symmetry, and u take a mirror image they're diff But their properties are the exact same
Sephrina
Sephrina•5mo ago
@Gamertug u got this or not?
Gamertug
GamertugOP•5mo ago
+solved @sans
iTeachChem Helper
iTeachChem Helper•5mo ago
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