Summary EDEXCEL A LEVEL CHEMISTRY UNIT 17 ORGANIC CHEMISTRY II NOTES
8 views 0 purchase
Course
Unit 17 - Organic Chemistry II
Institution
PEARSON (PEARSON)
I created these notes throughout y12&13 and used them for my A level 2022 exams. I got a grade 9 in GCSE and an A* at a level. These notes were made using the CGP revision guide, edexcel textbook and class notes in order to cover everything in the course. I have also added markschemes from past pap...
17.1.1 ISOMERISM
27 September 2021
19:45
Structural isomerism is when compounds have the same molecular formula but
different structural formula.
Chain - Different arrangement of C skeleton.
Position - Same functional group attached to a different part of the C chain.
Functional group - Different functional groups.
Stereoisomerism - Same structural formula but atoms have different special
arrangements.
17.1.2 E/Z ISOMERISM
27 September 2021
20:08
Stereoisomerism - Molecules with the same molecular and structural formula have a
different spatial arrangement of bonds.
E/Z isomerism - Occurs when there's restricted rotation about a bond and also
different groups are attached to the C atoms at each end of the bond.
Look at the atoms bonded with each C atom of the C=C double bond.
The atom with the highest atomic number is the priority group.
If the 2 groups have the same atom bonded to the C atom, the next bonded
atom is taken into account.
- If no priority groups, no geometric isomerism.
If the priority groups on the 2 C atoms are:
Opposite - E - Trans-
Same side - Z - Cis-
, 17.1.3 CHIRALITY & OPTICAL ISOMERISM
27 September 2021
20:09
Chiral molecule - Cannot be superimposed on its mirror image.
The chiral C centre has 4 different groups attached to it.
Asymmetric.
Optical isomers - Chiral molecules and its non-superimposable images.
Enantiomers.
Plane-polarised light has a single wavelength and vibrates in one direction.
The plane of polarisation of plane-polarised monochromatic light can be rotated by
optical isomers.
Both enantiomers rotate the plane in opposite directions.
Racemic Mixture - Equal amounts of the two enantiomers of a chiral compound, so
doesn't rotate plane polarised light.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller rajreuben. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.36. You're not tied to anything after your purchase.