DM - bonding and structure

Question 1

coordinations number?

Answer 1

the number of coordinate (dative) bonds the the ligand forms with the central metal ion

Question 2

shapes and bond angles of complex ions - SIX

Answer 2

octahedral shape

all bond angles are 90degrees

Question 3

shapes and bond angles of complex ions - FOUR

Answer 3

tetrahedral shape
- bond angles are 109.5degrees

but occasionally
square planar
- bonds angles are 90degrees
- happens in a few complexes eg. cisplatin (Pt , 2NH3, 2Cl-)