Properties of Alkenes and Stereoisomerism

Description

AS - Level Chemistry (13 - Alkenes) Flashcards on Properties of Alkenes and Stereoisomerism, created by Bee Brittain on 10/03/2016.
Bee Brittain
Flashcards by Bee Brittain, updated more than 1 year ago
Bee Brittain
Created by Bee Brittain almost 9 years ago
33
0

Resource summary

Question Answer
What are alkenes described as? What characteristic gives them this name? Alkenes are described as 'unsaturated hydrocarbons'. This is because they have a double bond.
How many regions of electron density are there around each carbon atom? There are 3 regions of electron density.
What is the bond angle around each carbon atom in a double bond and why? The bond angle is 120 degrees, this is because of the three regions of electron density that repel each other as far as possible.
Can the atoms around a double bond rotate? Explain. No, this is due to the two pi-bonds that are on each side of the sigma bond, locking the atoms in place and preventing them from rotation around the double bond.
State what is meant by the term 'unsaturated' Unsaturated mean that there is a double bond, or there could be more than one double bond.
What is the molecular formula, and the name, of the alkene that contains 5 carbons, with the double bond between carbons 2 and 3, and a chlorine on carbon 1. Name: 1-chloropent-2-ene Molecular Formula: C5H9Cl
What is the difference between a sigma bond, and a pi bond? A sigma bond is directly between the two carbon atoms, it is a head on overlap of orbitals, whereas the two pi bonds are above and below the sigma bond and are a sideways overlap of p-orbitals.
Define Stereoisomerism When two isomers have the same structural formula, but a different arrangement in space.
What conditions are needed for an isomer to be an E/Z Isomer? - A C=C double bond. - Different groups attached to each C atom of the double bond.
If something is an E isomer, what does this mean? The highest priority groups are diagonally across from each other.
If something is a Z Isomer, what does this mean? The highest priority groups are on the same side of the double bond.
Show full summary Hide full summary

Similar

AS Chemistry - Enthalpy Changes
Sarah H-V
GCSE - AQA: C1.1 The Fundamental Ideas in Chemistry
Olly Okeniyi
GCSE AQA Chemistry 1 Fuels & The Environment
Lilac Potato
GCSE AQA Chemistry 2 Salts & Electrolysis
Lilac Potato
OCR Chemistry Definitions 2.1
09valentinerhi
Acids and Bases
Sarah Egan
Biology B1.1 - Genes
raffia.khalid99
Introduction to the Atom
Derek Cumberbatch
A2 Organic Chemistry - Reactions
yannycollins
Chemistry 6 Extracting Vegetable Oil Core GCSE AQA
Chloe Roberts
C7 Quiz - Energetics
Leah Firmstone