CCl2F2 Lewis Structure, Characteristics: 13 Must to Know Facts


The CCl2F2 is an organic type compound which appears in the form of gas. Let us discuss some facts about the CCl2F2 lewis structure in detail below.

CCl2F2 or dichlorodifluoromethane or also referred to as Freon 12 belongs to the CFC’s compounds family. It consists of two halogens chlorine and fluorine that are located in the periodic table’s group 17. It holds a lot of importance from the industrial point of view.

The observed molecular weight of Freon 12 is around 120.9 g/mol. It is said to have a melting point of -157.7 degrees Celsius and boils at a temperature of -29.8 degrees Celsius. We will study some important facts about it regarding its lewis structure, shape angle etc. in the following sections.

How to draw CCl2F2 lewis structure

The CCl2F2 lewis structure contains one atom of carbon, 2 atoms of chlorine and fluorine each. The drawing of the structure has been discussed in detail below.

1. Finding the total number of valence electrons

The lewis structure of CCl2F2 has 32 total valence electrons. The carbon atom contributes four of its valence electrons. Fluorine atoms have 7 valence electrons, but there are 2 atoms of fluorine. Hence it will contribute 14 . Chlorine has 7 valence electrons ( 2X7 ) . It will contribute 14 electrons.

2. Determining atoms with least electronegativity

This step involves determining the atom with the least electro negativity. As the least electro negative atom has to be placed at the centre. Among the three atoms in the structure, carbon is the least electronegative atom in comparison with fluorine and chlorine. Hence carbon be placed at the centre.

3. Arranging electron pairs between atoms

The 4 atoms, 2 each of chlorine and fluorine are placed around the central carbon atom. Each atoms shares one electron with the central atom carbon. Hence the bond formation occurs as a result of sharing of one pair of electrons resulting into a single bond.

CCl2F2 lewis structure resonance

Resonance in the structure of a molecule helps us in studying the delocalization of electrons. Let us discuss the CCl2F2 lewis structure resonance concept.

There is no resonance in the CCl2F2 lewis structure. We can see that there are no electrons in the structure that are not satisfying the valencies of the atom. Hence there is no possible electron movement. Therefore we can say there is no delocalization of electrons.

CCl2F2 lewis structure shape

The number of atoms in the structure plays a key role in determining the shape of the structure. Let us see how.

The shape of CCl2F2 is tetrahedral. We can see that CCl2F2 lewis structure is of the form AX4. Where A is carbon and X are the 4 atoms of halogens fluorine and chlorine. So based on valence shell electron pair repulsion theory we can conclude it has tetrahedral geometry.

CCl2F2 lewis structure
CCl2F2 lewis structure

CCl2F2 lewis structure formal charge

Formal charge helps in predicting the lowest energy. Let us investigate the formal charge of CCl2F2.

The formal charge of CCl2F2 lewis structure is zero. The calculation has been discussed in detail below.

The equation for finding formal charge is

  • Formal charge = valence electrons – lone pair of electrons – No. of bonds
  • Formal charge of carbon = 4-0-8/2 = 0
  • Formal charge of Chlorine and fluorine (as both have same number of valence electrons) = 7-6-2/2 = 0

CCl2F2 lewis structure angle

In the earlier section, we have seen CCl2F2 lewis structure has the tetrahedral type of geometry. Let us analyze the bond angle in CCl2F2.

The bond angle of CCl2F2 molecules is 109.5°. And hence it has a coordination number of 4. One atom at the center and the other four surrounding it located at the corners.

CCl2F2 lewis structure octet rule

The octet rule is a term used in describing the bonding ability in atoms, which prefer eight electrons in the shell (valence). Let us see in CCl2F2.

CCl2F2 satisfies the octet rule. The central atom carbon has 4 valence electrons. It takes one electron each from the four halogen atoms. The remaining four halogen atoms share one electron with central atom. The valency of the halogen atom is 7. So, either they can accept or share an electron.

CCl2F2 lewis structure lone pairs

What we understand by the term lone pair, it is the pair on atom that is not shared in the covalent type of bonding. Let us discuss for CCl2F2.

  • Referring to carbon, the four valence electrons are shared with the 4 halogen atoms. In this way it’s valency is satisfied. Hence there is no electron left unshared on the carbon atom.
  • Fluorine and chlorine both have 7 valence electrons. One of each one is shared with central atom. But the other three pairs on each halogen atom is not involved in bonding. This are the lone pairs on the halogen atoms.

CCl2F2 valence electrons

The term valence electrons is referred to the electrons that are present in the outer shell of the atom. Let us see valence electrons in the structure of CCl2F2.

The total valence electrons in the lewis structure of CCl2F2 is 32. Four valence electrons are contributed from carbon. Seven valence electrons each are contributed from the four halogen atom ( 2 chlorine atoms and 2 fluorine atoms).

CCl2F2 hybridisation

In the concept of hybridization, the mixing of the orbitals takes place to give new orbitals which are referred to as hybrid orbitals. Let us analyze for CCl2F2.

The hybridization in CCl2F2 is sp3. We know that the bond formation is by single bond. Hence there is no pi bond and only sigma bonds exist. So while bond formation each bond has one sigma bond. Also, there is no lone pair on the central atom. Therefore its steric number will be four.

CCl2F2 solubility

The term solubility refers to the extent to which a substance can dissolve in any given solvent. Let us look for CCl2F2.

List of compounds in which CCl2F2 is soluble:

  • Water (0.286g/l at a temperature around 20 °C )
  • Benzene
  • Ether
  • Acetic acid

Why is it soluble in the above compounds ?

CCl2F2 is soluble in organic compounds like benzene and ethanol. CCl2F2 itself is an organic compound. Compounds prefer to dissolve in compounds that have similar properties to itself.

Is CCl2F2 ionic or covalent ?

An an ionic compound is where bond formation takes place between a metal and non metal. Let us see if CCl2F2 is ionic or not.

CCl2F2 is covalent and not ionic. We can see all the elements present in the structure are non metals. So the bond formation occurs between the non metals. And this kind of bonding is an example of covalent bonding. Depending on the nature of bond we categorize them as covalent or ionic.

Is CCl2F2 acidic or basic ?

We have seen that CCl2F2 is a kind of CFC. Let us find out whether it is acidic or basic in nature.

The compound CCl2F2 is acidic. CFCs are responsible for causing acid rains. Dichlorodifluoromethane is an inert gas and usually used in refrigerators as refrigerant. It is also referred to as Freon-12. So we can say the compound CCl2F2 is acidic.

Why and how CCl2F2 is acidic ?

CCl2F2 is an acidic compound as CCl2 is an acidic o pH ranges from 5 to 8. Which falls in the acidic category.

Is CCl2F2 polar or nonpolar ?

For a molecule to be polar there is should be at least some amount of difference in their electronegativities. Let us discuss the electronegativity of CCl2F2.

CCl2F2 is a polar compound. The electronegativity of carbon is 2.55, Chlorine 3.16 and Fluorine 3.98. So there is difference in their electronegativities. Hence CCl2F2 is referred to be a polar compound.

Why and how CCl2F2 is a polar compound ?

CCl2F2 is polar as there is an electronegativity difference of 1.43 between Fluorine and Chlorine. And a difference of 0.61 between carbon and Chlorine.

Conclusion

CCl2F2 is an organic compound with tetrahedral geometry with a bond angle of 109.5 degrees. It is a polar covalent compound.

Sania Jakati

This is Sania Jakati from Goa. I am an aspiring chemist pursuing my post graduation in organic chemistry. I believe education is the key element that moulds you into a great human being both mentally and physically. I'm glad to be a member of scintillating branch of chemistry and will try my best to contribute whatever I can from my side and Lambdageeks is the best platform where I can share as well as gain knowledge at the same time. LinkedIn-https://www.linkedin.com/in/sania-jakati-0954101bb

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