Flashcards in Reaction Mechanisms Deck (7)
- When a covalent bond breaks by homolytic fission, each of the bonded atoms takes one of the shared pair of electrons from the bond.
- Each atom would have a single unpaired electron shows by a dot.
An atom or groups of atoms with unpaired electron is called a radical.
- When a covalent bond breaks by heterolytic fission, one of the bonded atoms takes BOTH the electrons from the bond.
- The atom that takes both electrons becomes a negative ion.
- The atom that does not take the electrons becomes a positive ion.
A curly arrow shows the movement f an electron pair, showing either heterolytic fission or formation of a covalent bond.
* Half curly arrows represent the movement of single, unpaired electron in mechanisms involving radicals (homolytic fission).
2 reactants join together to form 1 product. Usually a double bond is turned to 2 single bonds.
An atom or group of atoms is replaced by another atom or group of atoms. Same number of products and reactants.