Unshared, or lone, electron pairs play an important role in determining the chemical and physical properties of organic compounds. Thus, it is important to know which atoms carry unshared pairs. Use the structural formulas below to determine the number of unshared pairs at each designated atom. Be sure your answers are consistent with the formal charges on the formulas. please answer the following for both pictures 2) and 3) he number of unshared pairs at atom a is ___ The number of unshared pairs at atom b is ___ The number of unshared pairs at atom c is ___

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
icon
Related questions
icon
Concept explainers
Question

Unshared, or lone, electron pairs play an important role in determining the chemical and physical properties of organic compounds. Thus, it is important to know which atoms carry unshared pairs.
Use the structural formulas below to determine the number of unshared pairs at each designated atom.
Be sure your answers are consistent with the formal charges on the formulas.

please answer the following for both pictures 2) and 3)

he number of unshared pairs at atom a is ___

The number of unshared pairs at atom b is ___

The number of unshared pairs at atom c is ___

The image displays the molecular structure of an organolithium compound. Specifically, it features a lithium ion (Li⁺) and a methyllithium molecule. 

* **Lithium Ion (Li⁺):** Represented as "Li⁺" on the left side of the image, indicating a positively charged lithium ion.

* **Methyllithium Molecule:** 
  - The central structure is composed of a carbon atom (C) bonded to three hydrogen atoms (H) arranged in a tetrahedral geometry to denote the methyl group. 
  - The carbon atom is additionally bonded to the lithium ion through a single bond.
  - Each hydrogen atom is labeled with an "H".
  - The carbon atom is labeled with a "C".
  - The lithium ion is labeled with "Li" and a positive superscript to represent its positive charge.

This depiction is a typical way to represent the structure of organolithium compounds, commonly used in organic chemistry.
Transcribed Image Text:The image displays the molecular structure of an organolithium compound. Specifically, it features a lithium ion (Li⁺) and a methyllithium molecule. * **Lithium Ion (Li⁺):** Represented as "Li⁺" on the left side of the image, indicating a positively charged lithium ion. * **Methyllithium Molecule:** - The central structure is composed of a carbon atom (C) bonded to three hydrogen atoms (H) arranged in a tetrahedral geometry to denote the methyl group. - The carbon atom is additionally bonded to the lithium ion through a single bond. - Each hydrogen atom is labeled with an "H". - The carbon atom is labeled with a "C". - The lithium ion is labeled with "Li" and a positive superscript to represent its positive charge. This depiction is a typical way to represent the structure of organolithium compounds, commonly used in organic chemistry.
This image shows the chemical structure of purine, a vital organic compound with significant biological importance. Purines are one of two types of nitrogenous bases found in nucleotides, which in turn are the building blocks of nucleic acids like DNA and RNA.

### Detailed Explanation of the Diagram:

1. **Chemical Structure:**
   - *Double Ring Structure*: Purine consists of a double-ring system. It is composed of a six-membered pyrimidine ring fused to a five-membered imidazole ring.
   - *Atoms and Bonds*: The rings include carbon (C), nitrogen (N), and hydrogen (H) atoms. The carbon atoms are represented by the vertices of the rings, and the nitrogen atoms are specifically marked with an 'N'.

2. **Numbering System:**
   - The positions on the rings are often numbered to differentiate the atoms and specify locations for various substitutions. In the diagram, certain positions are labeled with letters (a, b, c, etc.), which are placeholders often used in educational contexts to highlight points of interest.

3. **Chemical Groups:**
   - Specific hydrogen atoms (H) are attached to the carbon and nitrogen atoms at various positions.
   - The sixth position on the nitrogen ring often carries significance in substitutions and modifications pertinent to biological molecules.

Purines play a crucial role in encoding genetic information and are significant in various biochemical processes such as cell signaling, regulation of enzyme activity, and energy transfer.


By understanding the structure of purines, students can appreciate their functional significance in biochemistry and molecular biology.
Transcribed Image Text:This image shows the chemical structure of purine, a vital organic compound with significant biological importance. Purines are one of two types of nitrogenous bases found in nucleotides, which in turn are the building blocks of nucleic acids like DNA and RNA. ### Detailed Explanation of the Diagram: 1. **Chemical Structure:** - *Double Ring Structure*: Purine consists of a double-ring system. It is composed of a six-membered pyrimidine ring fused to a five-membered imidazole ring. - *Atoms and Bonds*: The rings include carbon (C), nitrogen (N), and hydrogen (H) atoms. The carbon atoms are represented by the vertices of the rings, and the nitrogen atoms are specifically marked with an 'N'. 2. **Numbering System:** - The positions on the rings are often numbered to differentiate the atoms and specify locations for various substitutions. In the diagram, certain positions are labeled with letters (a, b, c, etc.), which are placeholders often used in educational contexts to highlight points of interest. 3. **Chemical Groups:** - Specific hydrogen atoms (H) are attached to the carbon and nitrogen atoms at various positions. - The sixth position on the nitrogen ring often carries significance in substitutions and modifications pertinent to biological molecules. Purines play a crucial role in encoding genetic information and are significant in various biochemical processes such as cell signaling, regulation of enzyme activity, and energy transfer. By understanding the structure of purines, students can appreciate their functional significance in biochemistry and molecular biology.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Knowledge Booster
Theories of Bonding
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY