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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: sci4life on November 07, 2004, 12:39:30 AM

Title: optical isomerism
Post by: sci4life on November 07, 2004, 12:39:30 AM

which one is an optical active?

n-buty bromide
sec-butyl bromide
isobutyl bormide
tert-butyl bormide

I think it's sec-butyl bromide..but i'm not so sure about it...please help


Addition of bromine to cyclopentene gives a product that could be racemic trans...is it correct?

last one:
Stereochemistry does not necessarily correlate with optical rotation rite?

Title: Re:Need help
Post by: wgmwwggmmwgm on November 08, 2004, 09:36:39 AM

i  think you are right,belive yourself.

Title: Re:optical isomerism
Post by: Donaldson Tan on November 09, 2004, 08:50:11 AM

Quote

Addition of bromine to cyclopentene gives a product that could be racemic trans...is it correct?

this depends on the reaction condition. certain catalyst produced only one optical isomer. normally, it would be expected to produce a racemic mixture, as bromine can be added above and below the cyclopentene plane at equal probability.

Quote

Stereochemistry does not necessarily correlate with optical rotation rite?

there are many types of stereo isomerism. optical isomerism, E-Z isomerism to name a few.