14th Group

Carbon (C), Silicon (Si), Germanium (Ge)

  • Default: CH4, SiH4, GeH4 respectively.

  • Molecules:

    • Neutral atoms Implicit Hydrogens are added to have 4 bonds. 5 or more bonds are forbidden.

    • Charged atoms: Every added charge on these atoms (no matter it is positive or negative) decreases by one the number of possible bonds. Maximum charge accepted is ±4.

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

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

Tin (Sn)

  • Default: Sn

  • Molecules:

    • Neutral atoms: Implicit Hydrogens are added to have 4 bonds (if Tin has at least 1 bond). 5 or 6 bonds are also accepted.

    • Charged atoms:

      • Positive charge: Every added charge (no matter it is positive or negative) decreases by one the number of possible bonds. Maximum charge accepted is +4.

      • Negative charge: Not allowed.

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

  • Ions:

    • Sn2+ and Sn4+ are accepted.

  • Other:

    • Sn with 2 electrons in bonds and with at least to coordinate bonds are accepted.

Lead (Pb)

  • Default: Pb

  • Molecules:

    • Neutral atom:

      • 1 or 2 bonds: 1 or 0 implicit hydrogen is added, respectively.

      • 3 or 4 bonds: 1 or 0 implicit hydrogen is added, respectively.

      • 5 or 6 bonds are accepted.

      • More than 6 bonds are forbidden.

    • Charged atom:

      • Positive charge: Every added charge (no matter it is positive or negative) decreases by one the number of possible bonds. Maximum charge accepted is +4.

      • Negative charge: Not allowed.

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

  • Ions:

    • Pb2+ and Pb4+ are accepted.