A Lewis structure for NCS is shown below, however, its formal charges are not minimized. Starting from this structure, complete the correct structure with minimized formal charges.
Formal Charges
Formal charges have an important role in organic chemistry since this concept helps us to know whether an atom in a molecule is neutral/bears a positive or negative charge. Even if some molecules are neutral, the atoms within that molecule need not be neutral atoms.
Polarity Of Water
In simple chemical terms, polarity refers to the separation of charges in a chemical species leading into formation of two polar ends which are positively charged end and negatively charged end. Polarity in any molecule occurs due to the differences in the electronegativities of the bonded atoms. Water, as we all know has two hydrogen atoms bonded to an oxygen atom. As oxygen is more electronegative than hydrogen thus, there exists polarity in the bonds which is why water is known as a polar solvent.
Valence Bond Theory Vbt
Valence bond theory (VBT) in simple terms explains how individual atomic orbitals with an unpaired electron each, come close to each other and overlap to form a molecular orbital giving a covalent bond. It gives a quantum mechanical approach to the formation of covalent bonds with the help of wavefunctions using attractive and repulsive energies when two atoms are brought from infinity to their internuclear distance.
![**Question 7 of 28**
**Title:** Lewis Structure for NCS⁻
A Lewis structure for NCS⁻ is shown below, however, its formal charges are not minimized. Starting from this structure, complete the correct structure with minimized formal charges.
![Diagram of NCS⁻ Lewis Structure]
**Description of the Diagram:**
- The diagram presented shows the Lewis structure of the NCS⁻ ion.
- Nitrogen (N) is bonded to a central Carbon (C) which is in turn bonded to Sulfur (S).
- The bonding configuration is as follows:
- Nitrogen has one lone pair of electrons (two dots) and is single bonded to Carbon (N−C).
- Carbon is triple bonded to Sulfur (C≡S).
- Sulfur has two lone pairs of electrons (total of four dots).
- The diagram indicates the need to adjust the structure to minimize the formal charges on each atom.
**Task:**
Complete the correct Lewis structure for NCS⁻ with minimized formal charges based on the structure provided. Use the principles of formal charge calculation to adjust the electron distribution accordingly.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Faf3280c8-8a53-4cd7-b227-b3a58aeda25e%2Faeefd27a-5fbb-46e3-8934-1b649c25eb90%2F5mxxnus_processed.jpeg&w=3840&q=75)
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