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Boron: Group 3A

Boron: Group 3A. Boron Hydrides: B x H y. Also called “boranes”. Simplest is “diborane” B 2 H 6 Draw its Lewis structure. Bonding in diborane. Reactions of diborane. Other boron hydrides. Metalloboranes and carboranes. Boron vs. Aluminum Halides. Boron trichloride .

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Boron: Group 3A

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  1. Boron: Group 3A Boron Hydrides: BxHy 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

  10. 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.

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