Boron: Group 3A Boron Hydrides: BxHy Simplest is “diborane” B2H6

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Presentation transcript:

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

Bonding in diborane Reactions of diborane

Other boron hydrides

Metalloboranes and carboranes

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

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

Boron Oxides

Boron Nitride What is the Lewis structure similar to?

Industrial Production of Diamonds

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.