# A Brief Tutorial on drawing Electron Dot Structures of the N_{2}F^{+} cation

A ** simple procedure for writing Lewis structures** is given in a previous article 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)**.

Another example for writing Lewis structures following the above procedure is given below.

Let us consider the case of the** electron dot structures of N _{2}F^{+}cation**. The N

_{2}F

^{+}cation is of great interest.

**Force field studies**and

**ab initio calculations**suggested that this cation should possess an an unusually short N-F bond. The results of STO-6G valence bond (VB) calculations for the linear cation N

_{2}F

^{+}show that (a) the dominant Lewis-type VB structures involve a single positive charge which is located on either of the nitrogen atoms, and (b) a small amount of N–F π-bonding arises primarily from the formation of one-electron N–F π-bonds. It is suggested that N–F π-bonding is one of several factors which are responsible for the shortening of the N–F bond of N

_{2}F

^{+}.

Let us draw the **N _{2}F^{+} electron dot structures**?

__Step 1__:
Connect the atoms with single bonds:

__Step 2__:
Calculate the # of electrons in π
bonds (multiple bonds) using ** formula (1) **in the article entitled “Lewis Structures and the Octet Rule”.

Where n in this case is 3 since N_{2}F^{+} consists of 3 atoms.
Where V = (2*5 + 7 ) - charge = 17 – 1 = 16

Therefore, P = 6n + 2 – V = 6 *3 + 2 – 16 = 4

Therefore, there are: 1) either 2 double bonds 2) or 1 triple bond

__Step 3
& 4__: The Lewis structures for **N _{2}F^{+}** are as follows:

Therefore, three plausible **electron dot structures** were drawn for the N_{2}F^{+} cation. The least plausible structures are #1 (adjacent + charges ) and #3 (large charge separation)

__Relevant Posts - Relevant Videos__

Lewis Structures|Octet Rule: A Simple Method to write Lewis Structures

Simple Method for writing Lewis Structures – Lewis Structures of CF_{3}NO

__References__

- G.N. Lewis, J.A.C.S, 38, 762-785 (1916)
- E. C. McGoran, J. Chem. Educ., 68, 19-23 (1991)
- A.B.P. Lever, J. Chem. Educ., 49, 819-821 (1972)
- Karl O. Christe et al., J.A.C.S, 113, 3795-3800 (1991)
- R.D. Hartcourt, Australian J. of Chemistry, 56, 1121 - 1125 (2003)

__Key Terms__

** resonance structures of N_{2}F^{+}**,

__Lewis electron structures of ,__**,**

__chemical formula of N2F+3__**,**

__simple procedure for drawing Lewis structures of nitric acid__

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