Simple Method for writing Lewis Structures for Carbon Disufide CS2 | Chemistry Net

Simple Method for writing Lewis Structures for Carbon Disufide CS2

Simple Method for writing Lewis Structures for Carbon Disulfide CS2

Simple Method for writing Lewis Structures for Carbon Disulfide CS2

 

A simple procedure for writing Lewis Dot Structures was given in a previous post entitled Lewis Structures and the Octet Rule”.  Several worked examples relevant to this procedure were given in previous posts please see the Sitemap - Table of Contents (Lewis Electron Dot Structures).

Let us consider the case of the Lewis dot structures of carbon disulfide CS2.

Step 1:  Connect the atoms with single bonds. Carbon is the central atom since it is less electronegative.

 

 

Step 2: Calculate the # of electrons in π bonds (multiple bonds) using formula (1):

Where n in this case is 3 since CS2 consists of three atoms.

Where V = (4 + 6 + 6 ) = 16  

Therefore, P = 6n + 2 – V = 6 * 3 + 2 – 16 = 4     So there are 4π electrons in CS2  and that means 2 double bonds or a triple bond must be added to the structure in Step 1.

Step 3 & 4: The Lewis structure for CS2  is as follows:

 

Figure I.2:Lewis structures for carbon disulfide


Relevant Posts

Lewis dot structures of phosgene COCl2

Rules for writing Lewis electron resonance structures - formamidine

 


References

  1. G.N. Lewis, J.A.C.S, 38, 762-785, (1916)
  2.  E. C. McGoran, J. Chem. Educ., 68, 19-23 (1991)
  3. A.B.P. Lever, J. Chem. Educ., 49, 819-821, (1972)

Key Terms

simple method for drawing Lewis structures, Lewis structures of CS2, Lewis electron dot structures of CS2, dot structures of CS2,

 


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