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conformational analysis of a molecule. Finally, you will use the modeling tool to draw models of chiral molecules, labeling their chiral centers. Remember, molecular modeling is used as a predictive tool for the chemical and physical properties of different molecules. All of the results calculated using modeling algorithms must be verified by testing in the lab. Pre-Lab Questions: 1. Which of the following parameters can be calculated by Molecular Modeling software? a. Molar mass b. Bond angle c. Bond length d. Torsion angle e. All of these can be calculated 2. How many different combinations of chiral isomers are possible for a compound that contains 2 chiral carbon atoms? a. 2 b. 3 c. 4 d. 2 or 4 e. 3 or 4 3. True/False: Properties calculated using Molecular Modeling software are always accurate. Procedure: 1. Open a web browser and navigate to Chemagic.org. 2. Click on the Chemist's Doodle Pad, or click on the draw button on the Model Kit page. 3. Use the drawing pad to draw all the possible isomers of 2,3-dichlorobutane as bond line structures. Use the snipping tool or Print Screen command to copy the bond line structures into your Post-Lab assignment. 4. Optimize each isomeric structure of 2,3-dichlorobutane in the Model Kit page, use the R/S labeling tool to label each chiral center in all of the isomers. Using the snipping tool or Print Screen command copy the model structures into your Post-Lab assignment. 5. Load the R,S isomer model for 2,3-dichlorobutane for the following steps. 6. Calculate the molar mass of 2,3-dichlorobutane. 7. Calculate the following bond distances: C1-C2, C2-C3, C1-H, and C2-Cl.

conformational analysis of a molecule. Finally, you will use the modeling tool to draw models of chiral molecules, labeling their chiral centers. Remember, molecular modeling is used as a predictive tool for the chemical and physical properties of different molecules. All of the results calculated using modeling algorithms must be verified by testing in the lab.
Pre-Lab Questions:
1. Which of the following parameters can be calculated by Molecular Modeling software?
a. Molar mass
b. Bond angle
c. Bond length
d. Torsion angle
e. All of these can be calculated
2. How many different combinations of chiral isomers are possible for a compound that contains 2 chiral carbon atoms?
a. 2
b. 3
c. 4
d. 2 or 4
e. 3 or 4
3. True/False: Properties calculated using Molecular Modeling software are always accurate.

Procedure:
1. Open a web browser and navigate to Chemagic.org.
2. Click on the Chemist's Doodle Pad, or click on the draw button on the Model Kit page.
3. Use the drawing pad to draw all the possible isomers of 2,3-dichlorobutane as bond line structures. Use the snipping tool or Print Screen command to copy the bond line structures into your Post-Lab assignment.
4. Optimize each isomeric structure of 2,3-dichlorobutane in the Model Kit page, use the R/S labeling tool to label each chiral center in all of the isomers. Using the snipping tool or Print Screen command copy the model structures into your Post-Lab assignment.
5. Load the R,S isomer model for 2,3-dichlorobutane for the following steps.
6. Calculate the molar mass of 2,3-dichlorobutane.
7. Calculate the following bond distances: C1-C2, C2-C3, C1-H, and C2-Cl.

conformational analysis of a molecule. Finally, you will use the modeling tool to draw models of chiral molecules, labeling their chiral centers. Remember, molecular modeling is used as a predictive tool for the chemical and physical properties of different molecules. All of the results calculated using modeling algorithms must be verified by testing in the lab.
Pre-Lab Questions:
1. Which of the following parameters can be calculated by Molecular Modeling software?
a. Molar mass
b. Bond angle
c. Bond length
d. Torsion angle
e. All of these can be calculated
2. How many different combinations of chiral isomers are possible for a compound that contains 2 chiral carbon atoms?
a. 2
b. 3
c. 4
d. 2 or 4
e. 3 or 4
3. True/False: Properties calculated using Molecular Modeling software are always accurate.

Procedure:
1. Open a web browser and navigate to Chemagic.org.
2. Click on the Chemist's Doodle Pad, or click on the draw button on the Model Kit page.
3. Use the drawing pad to draw all the possible isomers of 2,3-dichlorobutane as bond line structures. Use the snipping tool or Print Screen command to copy the bond line structures into your Post-Lab assignment.
4. Optimize each isomeric structure of 2,3-dichlorobutane in the Model Kit page, use the R/S labeling tool to label each chiral center in all of the isomers. Using the snipping tool or Print Screen command copy the model structures into your Post-Lab assignment.
5. Load the R,S isomer model for 2,3-dichlorobutane for the following steps.
6. Calculate the molar mass of 2,3-dichlorobutane.
7. Calculate the following bond distances: C1-C2, C2-C3, C1-H, and C2-Cl.

Added by Brittany H.

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