Alkanes Flashcards
(7 cards)
1
Q
Define a sigma bond
A
A bond formed by the lengthways overlap of orbitals directly between two bonding atoms
2
Q
Why are alkanes unreactive?
A
They have a high bond enthalpy
3
Q
What is the trend in boiling point as the number of branches increases? Why?
A
Boiling point decreases
More branching means less surface area contact
Less London forces
4
Q
What is homolytic fission?
A
Each bonding atom receives one electron from the covalent bond, forming two radicals
5
Q
What is a radical?
A
A species with an unpaired electron
6
Q
What is a free radical?
A
Reactive species with an unpaired electron
7
Q
State the condition needed for free radical substitution mechanism
A
Ultraviolet Radiation
