Consider the molecule of furan. Its Lewis structure is shown. H H H. How many sigma (0) and how many pi (π) bonds are there in the furan molecule? 7 sigma and 2 pi bonds 9 sigma and 2 pi bonds 2 sigma and 7 pi bonds 2 sigma and 9 pi bonds 4 sigma and 5 pi bonds
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.
![**Consider the molecule of furan. Its Lewis structure is shown below.**
[Insert Lewis structure image of the furan molecule]
**Question:**
How many sigma (σ) and how many pi (π) bonds are there in the furan molecule?
**Options:**
- 7 sigma and 2 pi bonds
- 9 sigma and 2 pi bonds
- 2 sigma and 7 pi bonds
- 2 sigma and 9 pi bonds
- 4 sigma and 5 pi bonds
**Explanation of the Diagram:**
The Lewis structure of furan consists of a five-membered ring with four carbon atoms and one oxygen atom. Each carbon is bonded to two adjacent carbons, and the oxygen is bonded to two of the carbons in the ring. There are also hydrogen atoms attached to two of the carbon atoms.
### Key Features to Note in the Structure:
- **Sigma Bonds (σ):** These are the single bonds between carbon-carbon (C-C), carbon-oxygen (C-O), and carbon-hydrogen (C-H).
- **Pi Bonds (π):** These are the double bonds found in the ring structure.
You should count the number of σ and π bonds in the given structure to determine the correct option.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcb45a7b7-d1aa-4ac7-ad98-90aa0325071f%2F9211c3e1-2aa6-4db0-b1b2-1d17cbace21a%2Fgceyarr_processed.jpeg&w=3840&q=75)
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