Carbon is located exactly halfway to completing the octet rule for the outer energy level for elements on the periodic table. It has four electrons it will share in combinations with other elements. The compound you have listed is an organic compound composed of carbon and the four main members of group seventeen, the halogen family. The members of the halogen family, fluorine, chlorine, bromine, and iodine all have seven electrons in their outer energy shell. They need one electron donated or shared by another element to complete their octet rule. Bromochlorofluoroiodomethane is the resulting compound formed by the four halogens, with carbon as the center of the tetrahedral atom arrangement.
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: F :
.. .. ..
: Br: C : Cl :
.. .. ..
: I :
..
This is a Lewis dot-structure showing the carbon in the center of the atomic arrangement. Resonance structures for the compound would be illustrated by rotating the arrangement of halogens around the carbon atom, such as:
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: I :
.. .. ..
: Br : C : Cl :
.. .. ..
: F :
..
or
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: I :
.. .. ..
: Cl : C : Br :
.. .. ..
: F :
..
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