1. Boron: Group 3A Boron Hydrides: BxHy Simplest is “diborane” B2H6
Also called “boranes”
Simplest is “diborane” B2H6
Draw its Lewis structure

2. Bonding in diborane
Reactions of diborane

3. Other boron hydrides

4. Metalloboranes and carboranes

5. Boron vs. Aluminum Halides
Boron trichloride
Aluminum trichloride
Predict the structure of BeCl2.

6. Some Cool Hydroxides
LiOH
Mg(OH)2
B(OH)3
Al(OH)3

7. Boron Oxides

8. Boron Nitride
What is the Lewis structure similar to?

9. Industrial Production of Diamonds

11. Why is diamond formed, and not graphite?
H2(g)  2 H(g)
H(g) + CH4(g)  CH3(g) + H2(g)
CH3 + C(diamond-H, surface)  Diamond-CH3 + H
Why is diamond formed, and not graphite?
Reason 1. Reverse Reaction favors Graphite Instability
H + diamond  CH4, but slower than CVD diamond growth
H + graphite  CH4, but faster than CVD graphite growth
Reason 2. Forward Reaction favors Diamond Formation
sp3 C atoms on surface (show structures) slow sp2 graphite formation.