Complexes (Transition metal)

Question 1

Define complex

Answer 1

• central metal atom or ion
• surrounded by ligands wheich form dative covalent bonds w central ion/atom

Question 2

Define ligand

Answer 2

• non-metal
• molecule/ion
• contain at least 1 lone pair of e available to form coordinate/dative bond
• w central metal atom/ion

Question 3

Coordinate vs conventional covalent bond

Answer 3

Conventional covalent bond:
- Each atom supplies 1 e in a bond
Coordinate bond:
- Both e comes from one atom

Question 4

Why transitional metals form a lot of complexes

Answer 4

• relatively small sizes
• high charge density
• complex formed has high stability
• presence of energetically accessible vacant d orb
• transition metal ions can attract lone pair of e