2.22 - Dative Covalent Bonds Flashcards
1
Q
How is a dative covalent bond formed?
A
By an empty orbital of one atom overlapping with a lone pair of electrons from another atom
2
Q
In English, what is a dative covalent bond?
A
A bond where both electrons come from one atom
3
Q
How is it represented?
A
As an arrow, pointing to the atom which previously had an empty orbital
4
Q
How does a dative covalent bond form in the ammonium ion?
A
By a H+ ion bonding to the lone pair of electrons on the nitrogen
5
Q
What does a dative covalent bond normally result in?
A
A charge on the compound - it becomes an ion
6
Q
How can AlCl3 form dative covalent bonds, despite not needing to?
A
- The aluminium ion has 6 electrons in its outer shell
- So chlorine atoms from other compounds
- Can donate a lone pair to form a dative covalent bond
- Forming a lattice-like structure
