13th Group

Boron

  • Default: BH3

  • Molecules:

    • Neutral atoms:

      • Implicit Hydrogens are added to have 3 bonds.

      • 4 bonds are accepted with 1 negative charge on the boron atom.

      • 5 or more bonds are forbidden.

    • Charged atoms:

      • Positive charge: Every added charge decreases by one the number of possible bonds. Maximum charge accepted is +3.

      • Negative charge: BH4-, BH32- BH23- BH4- and B5- are accepted.

    • Radicals: Every added radical on these atoms decreases by one the number of necessary bonds.

    • Aromatic compounds: Boron may form aromatic bonds as well.

Aluminium (Al), Gallium (Ga), Indium (In), Thallium (Tl)

  • Default: Al, Ga, In, Tl respectively.

  • Molecules:

    • Neutral Atoms: 3 bonds around these atoms are accepted.

    • Charged atoms:

      • Positive charge: Every added charge decreases by one the number of possible bonds. Maximum charge accepted is +3.

      • Negative charge: 4- charge with 4 ligands is accepted.

    • Radicals: Every added radical on these atoms decreases by one the number of necessary bonds.

  • Ions:

    • Al+, Ga+, In+, Rb+, Al3+, Ga3+, In3+, Rb3+ are accepted.

  • Radical: ·Me2+ and ·?Me· are allowed.