Chapter 2-DF6 Flashcards
Alkenes-versatile compounds
What is the chemical formula for Alkenes?
CnH2n
What bonds do unsaturated fats contain?
Carbon-Carbon double bonds
What are cis/trans?
Isomers of an alkene
Is the double carbon bond planar?
Yes
What are the bond angles of ethene?
120
When is a sigma (σ) bond formed?
Formed when two s orbitals overlap
What does a double bond consist of?
One σ-bond and π-bond
What does one π-bond consist of?
two areas of negative charge, above and below the atoms
What are electrophiles?
The four electrons in the double bond give
that region a higher than normal density of
negative charge-means positive ions, or molecules with a partial positive charge will be attracted to this region-They can react by accepting a pair of electrons from the double bond
What is the definition of electrophiles?
A positive ion or a molecule with a partial
positive charge that will be attracted to a
negatively charged region and react by
accepting a lone pair of electrons to form a
covalent bond
Electrophilic addition
A positive ion, or a molecule with a partial positive charge (δ+), that will be attracted to a negatively charged region and react by accepting a lone pair of electrons to form a covalent bond
What is a curly arrow?
An arrow that shows where electrons move to and from
What is the test for alkenes?
Bromine water decolourises from orange to colourless
What is a nucleophile?
A molecule or negatively charged ion with a lone pair of electrons that it can donate to a positively charged atom to form a covalent bond
What is a carbocation intermediate?
An organic molecule, an intermediate that has a carbon atom bearing a positive charge and three bonds instead of four
