The number of σ bonds, π bonds and having pair of electrons in pyridine respectively.
The number of σ bonds, π bonds and having pair of electrons in pyridine respectively.
12, 3, 0
11, 3, 1
12, 2, 1
11, 2, 0
The Correct Option is B
Solution and Explanation
Pyridine has a chemical formula of C5H5N. The structure of pyridine consists of a ring of six carbon atoms and one nitrogen atom. Each carbon atom is bonded to two other carbon atoms and one hydrogen atom, and the nitrogen atom is bonded to one carbon atom and two hydrogen atoms. The nitrogen atom also possesses a lone pair of electrons. The aromatic ring has alternating single (σ) and double (π) bonds.
Counting the bonds and lone pairs:
- Carbon-carbon (C-C) single bonds: 5 (in the ring)
- Carbon-hydrogen (C-H) single bonds: 5 (one on each carbon)
- Carbon-nitrogen (C-N) single bond: 1
- Pi (π) bonds: 3 (these are part of the aromatic system)
- Lone pair of electrons on nitrogen: 1
Adding these up gives:
- Sigma (σ) bonds: 5 + 5 + 1 = 11
- Pi (π) bonds: 3
- Lone pair of electrons: 1
So, the correct option is (B): 11, 3, 1
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Introduction to Organic Chemistry
Organic chemistry is the branch of chemistry that involves the scientific study of organic compounds. Organic chemistry primarily deals with the structure and chemical composition of organic compounds, the physical and chemical properties of organic compounds, and the chemical reactions undergone by these compounds.
Reaction Intermediates in Organic Chemistry:
Intermediates can be understood as the first product of a consecutive reaction. For example, in a chemical reaction, if A→B and B→C, then, B can be said to be the intermediate for reaction A→C. The reactions in organic chemistry occur via the formation of these intermediates.
Reagents in Organic Chemistry:
Reagents are the chemicals that we add to bring about a specific change to an organic molecule. Any general reaction in organic chemistry can be written as:
Substrate + Reagent → Product
Where the substrate is an organic molecule to which we add the reagent. Based on the ability to either donate or abstract electrons, the reagents can be classified as:
- Electrophiles
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