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 Dithionate S

_{2}O_{6}__Step 1__: The central atoms is the S atoms. Connect the atoms with single bonds.

Fig. 1: Connect the dithionate atoms with single bonds |

__Step 2__: Calculate the # of electrons in π bonds (multiple bonds) using

**formula (1)**:

Where n in this
case is 8. Where V = 6*6 + 2*6 = 48 , V is the number of valence electrons of
the compound.

Therefore, P = 6n
+ 2 – V = 6 * 8 + 2 – 48 = 2

**\ So, there is 1 double bond**__Step 3 & 4__: The

*of S*

__Lewis__**dot resonance structures**_{2}O

_{6}

_{ }are

**as follows:**

Fig. 2: Plausible Lewis electron dot structures of dithionate |

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