NF4+ Lewis structure & characteristics: 15 complete facts

NF4+ Lewis structure refers to the internal structure of NF4+ salt. The electronic transition after bonding among the elements would be discussed in this article broadly.

NF4+ Lewis structure is a systematic representation of structuration of the ion. It is obvious from the symbolic notation of NF4+ that this compound is a positive ion contained compound. Formation of its Lewis structure reveals the electronic facts about this compound.

Let us focus on the different facts such as shape, angle, hybridisation and other internal formation of NF4+ throughout the article.

How to draw NF4+ Lewis structure

Drawing Lewis structure of the ion is followed by some easy steps, which is commonly deducted in case of any compound.  A study on the steps is given below.

Step 1: Calculating the number of valence electrons

The total count of valence electrons in the compound is important to identify before starting the drawing. This information is calculated by finding out the valence electron in each atom. This step is considered as the fundamental as valence electron count relevantly notifies the urge of electron in atoms.

Step 2: Finding electron deficiency in elements

Electron deficiency in Nitrogen and Fluorine atoms drives them to make bonds with each other. Therefore, finding the electron deficiency in atoms is significant before attaching the elements with bonds in the structure. This factor gives proper count of bonds as well.

Step 3: Recognising centre atom in NF4+

Centre atom is recognised after finding the deficiency of electrons. Centre atom in NF4+ is Nitrogen as it is larger than Fluorine and having higher bonding capacity. A single atom of Nitrogen participates in formation of NF4+ so it gets priority as centre atom here.

Step 4: Identifying bonds created by elements

Bonding is the most valuable feature in the compounds, which creates skeleton of the Lewis structure. After finding the number of electrons needed for stabilizing the elements in periodic table, engaging the elements with the centre atom by bonds is carried out in the drawing.

Step 5: Calculating formal charge of the salt

Formal charge calculation is significant factor for the compound and ionic salts. As NF4+ is holding a positive charge, it is important to find the reason of holding this charge on centre atom after sketching it’s the skeleton. Formal charge calculation completes the structure by putting charge in NF4+.

NF4+ Lewis structure resonance

Resonance refers to the process of making alternative structures of elements. Let us find the facts if valuable for the NF4+ ion or not.

NF4+ resonance is not justified as it holds a positive ion and no pi bond in it. Absence of Pi bonds and negative ion in NF4+ makes it impossible for NF4+ to generate alternative structure of the compound. Instead of negative ion, N has deficiency of electron that does not support the process of resonance.

Either negative ion impose the tendency of making new bond by satisfying deficiency of electron in ligands or pi bond breaks and given electron to centre atom. These facts support the process of resonance, which are irrelevant for NF4+.

NF4+ Lewis structure shape

Shape of the compound is fundamentally identified from the Lewis structure of elements. Let us discover the shape of Tretrafluronitrogen (NF4+) here.

NF4+ Lewis structure indicates that it is a tetrahedral shaped ion.  Twining effect is noticed in the compounds, which imposes disorder of the compound. However, this shape of NF4+ has been recognised after breaking NF4BF4 compound where the all solid NF4+ salts found to hold tetrahedral shape on X-ray sheet.

nf4+ lewis structure
NF4+ Lewis structure shape from Wikipedia

After analysing the structure of several crystals, containing NF4+ ion the exact shape of the salt could not be identified. But in low temperature 19F isomer of Fluorine has been examined and it gave a proper proof of tetrahedral NF4+ molecules inside crystalline NF4BF4.

NF4+ Lewis structure formal charge

Formal charge calculation is the last factor that gives a conclusion about the internal structure of compounds. Let us calculate the formal charge of NF4+ ion below.

There is a common formula for calculating formal charges of the compound. The formula is Formal charge = number of valence electrons – number of Covalent bonds– number of lone pairs or paired electrons of atoms.

From the table outlined below we can evaluate the calculation of formal charge in a systematic way-

Elements and CompoundNumber of valence electronsNumber of Covalent bondsNumber of lone pairs paired electrons of atomsFormal charge

N540(5-4-0) = +1F1716(7-1-6) =0F2716(7-1-6) =0F3716(7-1-6) =0F4716(7-1-6) =0NF4+


Formal charge calculation of NF4+ Lewis structure

NF4+ Lewis structure octet rule

Octet rule defines the theory followed by periodic elements while sharing electrons and making bonds with each other. Let us demonstrate the rule for NF4+ as a valuable fact.

NF4+ Lewis structure follows octet rule to make bonds in a stable way. According to octet rule, one element must possess eight electrons ion its last electron shell to get the ultimate stability like its nearest noble gas. In accordance with this factor all N shares its four electrons with four F atoms.

Four electrons of N fill octet state of Fluorine atoms as each F atoms needs 1-electron deficiency to reach eight electrons. N cannot get satisfaction regarding octet rule it shares one extra electron that creates one electron deficiency in N and made the overall compound positively charged.

NF4+ Lewis structure lone pairs

Number and characteristics of lone pairs in compound is needed to identify proper shape and bond angle of compounds. This fact is described below.

NF4+ Lewis structure holds total 12 lone pairs and 1 single electron. Nitrogen shares 4 electrons from 5 where one single electron remains alone in the structure. After making by sharing one electron each of the four F atom has to hold 3 lone pairs. Therefore, total number of lone pair becomes (4*3) = 12

VSEPR (Valence Shell Electron Pair Repulsion) theory encourages the calculation of lone pairs in compounds after making bonds. This theory says lone pair can affect the bond angle of compound so it is needed to analyse the number and position of lone pairs exists in compounds.

NF4+ valence electrons

Valence electron calculation activates understanding about electron extensity or deficiency in elements. We need to calculate the total number of valence electrons in NF4+ here.

  • Number of valence electrons in Nitrogen = 5
  • Number of valence electrons in each of the Fluorine atom = 7
  • Number of participative Fluorine atoms in NF4+ = 4
  • Total number of valence electron holds by four fluorine atoms = (4*7) = 28
  • Total number of valence electron in NF4+ = (28 + 5) = 33
  • One electron deficiency makes total number if valence electron in NF4+ = (33-1) = 32

Valence electrons notifies about the requirements of electrons in the elements to satisfy their octet state. Based on this information element undergoes bonding process. Therefore, it is considered as the most significant factor in elements in chemistry of periodic table.

NF4+ bond angle

Bond angle is important information for satisfying physical outline of compounds. Let us identify the bond angle of NF4+ Lewis structure.

NF4+ bond angle has been identified as 109.5°. This is the ideal bond angle tetrahedral geometry. It means that the angle between each bond created by Fluorine atom with central atom, Nitrogen in NF4+ is 109.5°, which is not affected by any external or internal effect on the compound.

VSEPR theory evaluates that the presence of lone pair-lone pair and lone pair-bond pair repulsion make the difference in bond angles. In the case of NF4+ ion, this repulsion cannot influence change in angles as it holds a simple tetrahedral shape.

NF4+ hybridization

Hybridisation structure of atoms can be identified by studying the Lewis structure of compounds. This fact is demonstrated below with specific information about NF4+.

NF4+ hybridisation is sp3. This information is ideally collected by studying the tetrahedral shape of the compound. Tetrahedral shape denotes ideal hybridisation as sp3. This fact is quite similar as the hybridisation of NH4+ and in both the compound N have sp3 hybridisation.

First electron of first fluorine atom shifts in the void place of p orbital in it.  Other electrons from d orbital for Fluorine atoms shift towards the single electron of 2 p orbitals in Nitrogen to make pairs.  Third p orbital holds a single electron. Overall hybridisation takes place as sp3.

Is NF4+ soluble in water?

Solubility in water of compound depends in the internal bond strength between the elements. Let us find the fact about solubility of NF4+ in water.

NF4+ is expected to be soluble in water. In presence of polar water, nitrogen is influenced to break bonds. As water is polar, it pulls electrons easily. In the case of NF4+, deficiency of electron makes the compound weak and it becomes easy of water molecule to break N-F bond.

Why and how does NF4+ soluble in water?

NF4+ is soluble in water due to weak internal bond strength of Nitrogen with fourth fluorine atom. Nitrogen wants to break than bond and be stable by erasing the deficiency of one electron.

Is NF4+ a molecular compound?

Molecular compounds refer to that compound which contains molecules only. Let us find NF4+ is molecular or not.

NF4+ cannot be considered as a molecular compound. This compound definitely contains molecules but its also contains ions. As molecular compound do not use to hold cation or anion, NF4+ cannot be considered as molecular in chemistry.

Why NF4+ is not molecular?

NF4+ is not molecular because it does not hold molecules only in its internal structure. The presence of ions on the centre atom or any ligand of a compound does not support the criterion of being molecular.  The ion can be considered as partially molecular.

Molecular compound hold only non-metals. In that case, NF4+ could be considered as molecular but positive charge on Nitrogen discriminates NF4+ from being molecular.

How NF4+ is not molecular?

NF4+ is not completely molecular by filling the way of making covalent bonds. An Ionic bond refers to the pure molecular nature of compounds.  When different ions satisfy each other’s opposite ionic values a neutral formation of compound makes it molecular in an ideal way.

Nitrogen makes bonds with Fluorine atoms by giving almost all the valence electrons. After bonding, it has to hold a positive charge as it loses one extra valence electron to get stability.

Is NF4+ an acid or base?

NF4+ is an ion and its acidity or basicity refers to the electronic property internally held by it. Let us describe the fact thoroughly.

NF4+ should be considered as a Lewis base. This compound is quite fascinating with exceptional characteristics in it. It is holding different chemical attributes radically. Therefore, its acidity has to be analysed with a brood description on its formation and chemical composition.

Why NF4+ is base?

A Lewis base is defined by the capability of donating one or more than one electron pairs. Let us find the reason for calling NF4+ a Lewis base.

NF4+ is base as the extra electron on Nitrogen is easily donated by it. This characteristic of donation is supportive towards the property of being Lewis base. The compound has no space to adopt electron as it is filled with total 32 valence electrons so it cannot be an acid anyway.

How NF4+ is base?

NF4+ is base by donating electrons to needy ions. The formation of this ion is preceded by increasing oxidising power of Fluorine with the help of strong Lewis acid. This factor refers to the basicity of NF4+.

Is NF4+ an electrolyte?

Electrolyte stands for the term that defines the capacity of holding +ve or -ve charge by compounds in molten state. Let us focus on the electrolytic capacity of NF4+.

NF4+ is an electrolyte. The compound is holding a positive charge in a stable way. The stable formation of NF4+ by losing one electron defines its capacity of holding positive charge in centre atom.

Why NF4+ is electrolyte?

NF4+ is electrolyte as it contains a positive ion on the central atom. The compound is capable of influencing movement of electrons in water solution. However, while describing its solubility it has been identified that the ion can break itself in water that also supports its electrolyte nature indeed.

How NF4+ is electrolyte?

NF4+ is an electrolyte by holding more protons those electrons. This is the way of considering it is a cation one positive charge. Cationic formation of the compound is the driving force behind processing electrolyte solution in water for NF4+.

Is NF4+ a salt?

Salt is formed by ionic conjugation between positive and negative ions by giving out a neutral compound. Now this section would define if NF4+ were a salt or not.

NF4+ cannot be considered as salt by nature. It contains two different non-metals and a positive charge. The bonding between nitrogen and Fluorine atoms do not activates the formation of any neutral compound.

Why and How NF4+ is not a salt?

NF4+ is not a salt as it creates bonds by sharing electrons partially. Partial electron share process refers to the formation of covalent bond. Salts are formed by ionic bonds and neutralisation of two opposite ions. NF4+ itself are an ion that can make neutral compound by making bond with anions.

Is NF4+ ionic or covalent?

Ionic or covalent factor is determined by studying the formation of bonds among elements. Let us recognise the formation of type of Tetrafluronitrogen ion.

NF4+ is a covalent compound. Apparently, the compound looks like an ionic compound as it holds a positive charge it is. Electronic reaction between Nitrogen and Fluorine gives an idea about its formation through reflecting covalent nature.

Why NF4+ is Covalent?

Covalent bonds refer to the formation of compound from two different molecules. Let us examine the reason of calling NF4+ a covalent compound.

NF4+ is a covalent compound as the bonding between two molecules influences its formation. Ionic bond defines the formation of neutral compound from two different ions. After making bond with Fluorine atoms Nitrogen has to initiate losing one electron and holding positive ion instead of neutralisation.

How NF4+ is Covalent?

NF4+ gains covalence through the partial electron share between Nitrogen and Fluorine atoms. The compound is formed to satisfy octet valence. Valence satisfaction process makes NF4+ a covalent compound even after holding an ion in centre.


This article has described several facts about Tetrefluronitrogen. This salt appears as a cation that has been justified with its exceptional characteristics in this article. However, the article shared chemical and physical facts, which are deliberately indicated by drawing NF4+ Lewis structure.  

Also Read: