Unit 1 7) Naming Complexes

Question 1

Rule 1 ) the ________ are named first , in alphabetical order , followed by the _________ ______ and its oxidation state

Answer 1

The ligands are named first , in alphabetical order , followed by the transition metal and it’s oxidation state

Question 2

If the ligand is a negative ion ending in -ide , then in the complex the ligand name changes to _____ : eg ….

Answer 2

if the ligand is a negative ion ending in -ide , then in the complex the ligand name changes to -ido : 
Eg 
F- fluoride ligand is named fluorido 
Cl- chloride ligand is named chlorido 
Br- bromide ligand is named bromido 
I- iodide ligand is named iodido 
CN- cyanide ligand is named cyanido 
OH- hydroxide ligand is named hydroxido

Question 3

If the ligand is oxalate , it’s named ________ in the complex

Answer 3

If the ligand is oxalate , it’s named oxalato in the complex

Question 4

What is the formula of the oxalate ligand

Answer 4

• note that the oxalate ligand bonds to the transition metal ion through two of the oxygen atoms in the formula for a complex, the formula of the oxalate ligand is written (O2C2O2)2-

Question 5

• if the ligand is ammonia (NH3) it is named _______ in the complex
• the charge on ammonia is __

Answer 5

• If the ligand is ammonia (NH3 ) it is named ammine in the complex
• ammonia is neutral (no charge)

Question 6

• If the ligand is water it is named _____ in the complex
• how is it written in formulae form
• what is the charge

Answer 6

• if the ligand is water it is named aqua in the complex
• note that as water molecules bond to the transition metal ion through the oxygen atom ,n the formula for a complex, the formula for the water ligand is written as OH2
• water is neutral (no charge)

Question 7

• if the ligand is carbon monoxide (CO) it is named _______ in the complex
• what is the charge

Answer 7

If the ligand is carbon monoxide (CO) it is named carbonyl in the complex
- it is neutral

Question 8

A prefix is used to show how many of each ligand is present (di,tri,tetra , penta, hexa , hepta,octa for …..

Answer 8

2,3,4,5,6,7,8 respectively

Question 9

If the complex is negative overall the name of the complex ion metal ends in -ate :give an example

Answer 9

Cobalt would be cobaltate

Question 10

If the complex is negative overall and the ion metal is either iron or copper what would these be named

Answer 10

Cuprate for copper

Ferrate for iron

Question 11

Symbols for ligands are written in Alphabetical order

Answer 11

Look at notability notes /slides for examples