CF2Cl2 Lewis Structure,Characteristics:13 Must To Know Facts


In this article we will discuss about Cf2cl2 Lewis Structure,Characteristics:13 Must To Know Facts

CF2Cl2 is called Dichlorodifluoromethane this molecule is also represented by Freon-12 or R-12 which has a CCl2F2 chemical formula. Dichlorodifluoromethane is a colourless gas with an ether-like odour. odour.  When carbon tetrachloride (CCl4) reacts with hydrogen fluoride (HF) in the presence of antimony pentachloride catalyst CF2Cl2 (dichlorodifluoromethane) is formed.

CCl4 + 2HF → CCl2F2 + 2HCl

How to draw CF2Cl2 lewis structure ?

In the 7A and 17th group of the periodic table, the chlorine and fluorine atoms are present hence 7 valence electrons are present in the chlorine as well as a fluorine atom. On the other hand, the carbon atom is present in the 14th or 4A group of the periodic table hence its valence electrons are 4.

CF2Cl2 lewis structure valence electrons

Valence electrons present in Carbon atom = 4 , Valence electrons present in two fluorine atoms = 14 , Valence electrons present in two chlorine atoms =14 Therefore, in CF2Cl2 molecule total number of valence electrons are 32 (4+14+14=32)

 The electronegativity of carbon is 2.55 that of chlorine atom is 3.16 and the electronegativity of fluorine atom is 3.98. According to electronegativity, the carbon atom is a less electronegative atom. Hence while drawing the Lewis structure of the CF2Cl2 molecule Carbon atom will be placed in the centre of the molecule, and fluorine and chlorine atoms are placed around the central carbon atom.

Now each atom in the CF2Cl2 molecule form one single bond that is a central carbon atom is connected with two fluorine atom and two chlorine atoms with a single bond. Every single bond contains two electrons.  Therefore, four single bonds used eight valence electrons. The remaining 24 valence electrons are placed around the fluorine and chlorine atom. In the CF2Cl2 molecule, the outermost chlorine and fluorine atoms required 8 valence electrons to complete its octet. Hence all 24 valence electrons are distributed among themselves.

Lewis Structure of CF2Cl2

CF2Cl2 Lewis structure formal charge

The Lewis structure formal charges of CF2Cl2 can be calculated by the following formula, FC = V – N – B/2 Where V = no. of valence electrons,  N = no. of non–bonding electrons,  B = no. of bonding electrons  formal charge of the CF2Cl2 lewis structure is as follows,

FC of C in CH2Cl2 lewis structure = 4 – 0 – 8/2 = 0

FC of F in CH2Cl2 lewis structure = 7 – 6 – 2/2 = 0

FC for Cl in CH2Cl2 lewis structure= 7 – 6 – 2/2 = 0

CF2Cl2 Lewis structure shape

According to VSEPR theory, the molecular geometry of CF2Cl2 is tetrahedral. The CF2Cl2 molecule is formed by one central carbon atom which is surrounded by two fluorine and two chlorine atoms, this molecule does not contain lone pair of electrons. hence it shows AX4 type molecule as per VSEPR theory those molecules which have AX4 type molecule show tetrahedral geometry hence CF2Cl2 molecule also shows tetrahedral shape. In which A represents the central atom and X4 represents the number of bonded atoms .

Tetrahedral structure of CF2Cl2 wikipedia

Hybridization of CF2Cl2

 The hybridization of any molecule was decided by its steric number.  The hybridization of the CF2Cl2 molecule can be decided by calculating the steric number. Which is calculated by the sum of the number of bonded atoms attach to the central atom and the number of lone pairs on the central atom. Hence a steric number of CF2Cl2 molecule calculated is as follows:

 Steric number of CF2Cl2 = (Number of bonded atoms attached to carbon + Lone pair on carbon atom)

Steric number of CF2Cl2 = (4 + 0) = 4 Therefore, the CF2Cl2 molecule shows Sp3 hybridization.

CF2Cl2 Lewis structure lone pairs

In the CF2Cl2 molecule, the central atom carbon does not contain any lone pair of an electron around itself, It has all bonded electron pair and become stable by achieving its octet.

CF2Cl2 Lewis structure resonance

 Due to the asymmetrical structure of the CF2Cl2 molecule, it does not show resonating structure also this molecule does not contain a double bond for delocalization, because resonating structures are formed when a molecule has a symmetrical structure with a double bond, which undergoes delocalization of electron and movement of the double bond and form various canonical or resonating structures.

CF2Cl2 solubility

Solubility of any molecule depends on the principle of “Like Dissolves Like”.

This means that similar groups present in the molecule dissolve in the same polar solvent. If the molecule is polar then this molecule dissolves in the same polar solvent. Hence CF2Cl2 molecule is a polar molecule so it dissolves in polar solvents like H2O (water) and NH3(ammonia) and is insoluble in a non-polar solvent like CCl4 (carbon tetrachloride), pentane, hexane etc.

Is CF2Cl2 polar or nonpolar ?

 CF2Cl2 molecule has an asymmetrical structure due to which the charge distribution among them is uneven with the non-zero dipole moment hence CF2Cl2 molecule shows a polar nature. Also due to less electronegativity of the carbon atom, it has a positive charge on itself and chlorine and fluorine have high electronegativity hance it has a negative charge on itself, due to different magnitude the dipole moments in CF2Cl2 molecules will not be cancelled out with each other hence due to non-zero dipole moment CF2Cl2 molecule is polar in nature.

Is CF2Cl2 ionic?

CF2Cl2 molecule is a non-ionic molecule because CF2Cl2 is a polar molecule with a zero-dipole moment, also it does not have lone pair of electrons and ionic charges around itself.

What is the lewis structure of CF2Cl2 ?

Ans: CF2Cl2 lewis structure is formed by, One carbon atom is placed in the center and two fluorine and two chlorine atoms are attached to carbon by four single covalent bond. It shows Sp3 hybridization with tetrahedral geometry.

How many valence electrons does CF2Cl2 have?

Ans: CF2Cl2 molecule has 32 valence electrons, Valence electrons present in Carbon atom = 4 , Valence electrons present in two fluorine atoms = 14 , Valence electrons present in two chlorine atoms =14 Therefore, in CF2Cl2 molecule total number of valence electrons are 32 .

Is CF2Cl2 polar or nonpolar?

Ans: CF2Cl2 molecule has an asymmetrical structure due to which the charge distribution among them is uneven with the non-zero dipole moment hence CF2Cl2 molecule shows a polar nature.

Conclusion

In this article we will discuss the Lewis structure of CF2Cl2 molecule , it shows Sp3 hybridization with tetrahedral geometry. This molecule is polar in nature.CF2Cl2 molecule contains 32 valence electrons, i.t has no lone pairs on it also non ionic molecule

Darshana Fendarkar

Hi..I am Darshana Fendarkar, I have completed my PhD from University of Nagpur and am pursuing M.Sc in Chemistry from Nagpur University. My area of specialization is on Inorganic Chemistry.

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