【】SF4 Lewis Structure ,Valence Electrons,Formal Charge,Octet Rule
SF4 Lewis Structure
SF4 Lewis structure(Sulfur tetrafluoride electron dot structure) is that type of diagram where we show the total 34 valence electrons of SF4 as dots , or dots and dashes(-).In Lewis structure,it is common that a bonding pair of two electrons can be shown by dash(-) or dots(●●) but a lone pair of two electrons is shown by dots[●●].
Hello,today I am going to draw the SF4 Lewis structure in just five steps.
SF4 Lewis Structure Setup Step-1:
To draw the SF4 Lewis structure , we have to find out the valence electrons of sulfur and fluorine first.We express valence electrons as dots in lewis dot structure.
To get the valence electrons of sulfur,we need to look at the electronic configuration of sulfur.
S(16)=1s²2s²2p⁶ 3s² 3p⁴ 3d
The highest value of principal quantum number here is n=3.
The highest value of principal quantum number ,n , indicates the valence shell and we know the electrons in valence shell is called valence shell.
The nunber of valence electrons in sulfur is 6.
Remember that due to presence of d orbital in 3rd shell of sulfur,it can accomodate more that eight electrons in its valence shell.
Again, we have to find out the valence electrons of fluorine.
To get the valence electrons of fluorine,we need to look at the electronic configuration of fluorine.
F(9)=1s²2s²2p⁵
The highest value of principal quantum number here is n=2.
The highest value of principal quantum number ,n , indicates the valence shell and we know the electrons in valence shell is called valence shell.
The nunber of valence electrons in fluorine is 7.
Step-2:
SF4 Valence Electrons
Now we have to count total number of valence electrons in SF₄.
S =6
4×F=7×4=28
So,in SF₄ we are getting 6+28=34 electrons totally.
SF4 Lewis Structure Setup Step-3:
Now we have to determine the central atom in SF₄ .The central atom is that kind of atom that is single or that has lower electronegativity.In case of SF₄ , S is the central atom and fluorine is the outer atom as sulfur is less electronegative than fluorine .
SF4 Lewis Structure Setup Step-4:
Now we need to connect the outer atoms with the central atoms using single bond or line(-).Every line represent two 【●●】dots or two valence electrons.
In the above structure,we have used 8 valence electrons.So,we have 34-8=26 left.
Now we will use valence electrons to satisfy the outer atoms for completing its octet first.
In the above structure,we have used 32 valence electrons.So,we have 34-2=2 left.
The remaining 2 electrons will come over central atom now.
In the above structure,we have used 34 valence electrons.So,we have 34-34=0 left.
This is the SF4 Lewis structure.
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SF4 Lewis Structure||Lewis Structure for SF4 (Sulfur Tetrafluoride |
SF4 Formal Charge
Now we need to calculate the formal charge for each atom of the above structure.
F=7-(6+1)=0
S=6-(2+4)=0
In the best Lewis structure of SF4,S atom doesn't follow the octet rule but the fluorine atoms follow the octet rule.So SF4 doesn't follow the octet rule completely.In the best SF4 Lewis structure,S has 10 valence electrons but each fluorine atom has eight valence electrons.Due to presence of d orbital in the valence shell of S,it can hold more than eight valence electrons.
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