Please help me with optically activity of cis trans isomer

Chemistry and homework help forum.

Organic Chemistry, Analytical Chemistry, Biochemistry, Physical Chemistry, Computational Chemistry, Theoretical Chemistry, High School Chemistry, Colledge Chemistry and University Chemistry Forum.

Share your chemistry ideas, discuss chemical problems, ask for help with scientific chemistry questions, inspire others by your chemistry vision!

Please feel free to start a scientific chemistry discussion here!

Discuss chemistry homework problems with experts!

Ask for help with chemical questions and help others with your chemistry knowledge!

Moderators: Xen, expert, ChenBeier

Post Reply
Highwayservant
Newbie
Newbie
Posts: 3
Joined: Tue Jan 24, 2023 9:31 pm

Please help me with optically activity of cis trans isomer

Post by Highwayservant »

167E366A-BE88-4A4A-BF1A-BB3881B8745F.jpeg
167E366A-BE88-4A4A-BF1A-BB3881B8745F.jpeg (149 KiB) Viewed 4047 times
Can someone help me explain why the answer is B? Why is trans isomer with chiral carbon optically active?
User avatar
ChenBeier
Distinguished Member
Distinguished Member
Posts: 1541
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

Re: Please help me with optically activity of cis trans isomer

Post by ChenBeier »

B and D have chirality Center in the glycerol unit, because 4 different substituents.
Highwayservant
Newbie
Newbie
Posts: 3
Joined: Tue Jan 24, 2023 9:31 pm

Re: Please help me with optically activity of cis trans isomer

Post by Highwayservant »

Thanks for your reply. But why is the answer B, not D?
User avatar
ChenBeier
Distinguished Member
Distinguished Member
Posts: 1541
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

Re: Please help me with optically activity of cis trans isomer

Post by ChenBeier »

Its B , because it asked for trans fat. D is the cis fat.
Highwayservant
Newbie
Newbie
Posts: 3
Joined: Tue Jan 24, 2023 9:31 pm

Re: Please help me with optically activity of cis trans isomer

Post by Highwayservant »

Oh yeah, oic, so the ‘trans’ in trans fat is trans isomer. Thanks for letting me know. Haha, never thought of it. Thanks!
rewarddecor
Newbie
Newbie
Posts: 1
Joined: Thu Feb 16, 2023 1:46 am

Re: Please help me with optically activity of cis trans isomer

Post by rewarddecor »

Very nice, I also just learned and understood it today. :D
Post Reply