Difference between revisions of "GChemPaint/C2/Formation-of-molecules/English"
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||Slide Number 2 | ||Slide Number 2 | ||
Learning Objectives | Learning Objectives | ||
| − | In this tutorial, we will learn to | + | ||In this tutorial, we will learn to |
Add and modify structure of compounds | Add and modify structure of compounds | ||
Change current element | Change current element | ||
Revision as of 15:19, 1 July 2013
| Visual Cue | Narration |
|---|---|
| Slide Number 1
Title Slide |
Hello every one
Welcome the tutorial on Formation of molecules in GChemPaint. |
| Slide Number 2
Learning Objectives |
In this tutorial, we will learn to
Add and modify structure of compounds Change current element Add Alkyl groups Add and modify carbon chain |
| Slide Number 3
System Requirement |
Here I am using
Ubuntu Linux OS version. 12.04 GChemPaint version 0.12.10 |
| Slide Number 4
Pre-requisites |
To follow this tutorial you should be familiar with,
GChemPaint chemical structure editor. If not, for relevant tutorials, please visit our website. |
| Slide Number 5
Structures |
Here is slide for the structures of Propane, Butane and Heptane. |
| Switch to GchemPaint application. | I have opened a new GChemPaint application with Propane and Butane structures as shown in the slide |
| Point to carbon atoms. |
Let's replace the terminal Carbon atoms in Butane structure with Chlorine atoms. |
| Point to Periodic table combo button. | For this I will use the Periodic table combo button.
Click on Current element drop-down arrow button. |
|
Hover the mouse over the Periodic table |
Click on Current element drop-down arrow button.
This button is known as periodic table combo button. Observe the built-in Modern periodic table. |
| Select Cl from the table.
Point to the Cl on toolbox |
Select Cl from the table.
Observe Cl in the tool box. |
| Click on Add or modify an atom tool>>click to replace
Point to the structure |
Click on Add or modify an atom tool.
Click on terminal carbon atoms to replace them with Cl atoms. The new structure obtained is 1,2-dichloroethane. |
| Let's write its name below the structure. | |
| Click on Add or modify a text tool>>Click on Display area | Click on Add or modify a text tool.
Click on Display area below the structure. |
| Point to the blinking cusor
Observe the blinking cursor enclosed in a green box. Type 1,2-dichloroethane in the box and click anywhere on the display area. | |
| Next let's replace central carbon atom in Propane structure with oxygen atom. | |
| Press Shift and O keys simultaneously>> A submenu opens with O and Os | Place the cursor near the central atom of the Propane structure.
Press capital O. A submenu with O and Os opens. |
| Select O | Select O.
Carbon and Hydrogen atoms will be replaced by Oxygen atom. The new structure obtained is Dimethylether. |
| Let's write its name below the structure. | |
| Click on Add or modify a text tool>>Click on Display area | Click on Add or modify a text tool.
Click on Display area below the structures. |
| Point to the blinking cusor | Type Dimethylether in the box. |
| Press CTRL+ S. | To save the file, Press CTRL+ S. |
| Save as dialog box opens | Save as dialog box opens. |
| Enter the file name as chloroethane-ether >> click on Save button. | Enter the file name as Chloroethane-ether.
Click on Save button. |
| Click on Close to close the window. | Click on Close to close the window. |
| Slide Number 5
Assignment |
Draw Ethane and Pentane structures.
Replace one carbon atom of Ethane with Br. Replace the terminal carbon atoms of Pentane with I. Your assignment's output should look like this. |
| Now I will explain about Alkyl groups. | |
| Alkyl group is a fragment of an Alkane.
For example: Methyl CH3 is a fragment of methane CH4 Successive members of an Alkyl group differ by a CH2 group. Homologues of the Alkyl group series includes, Methyl is CH3 Ethyl is C2H5 Propyl is C3H7 Butyl is C4H9 and so on. | |
| Switch to GchemPaint application. | I have opened a new GChemPaint application with a heptane structure as shown in the slide. |
| Now I will demonstrate how to number the chain positions.
Numbering helps to identify the chain positions. | |
| Click on Add or modify a text tool>> Click on Display area near the first chain position>>
Enter 1 in the green box. |
Click on Add or modify a text tool.
Click on Display area near the first chain position. Enter 1 in the green box. |
| Click near the second chain position. Enter 2 in the box. | Next, click near the second chain position.
Enter 2 in the box. |
| Point to other chain positions. | Likewise I will number the other chain positions as 3, 4, 5, 6 and 7. |
| Now let's branch Heptane using Alkyl groups at various positions. | |
| Point to the third position. | Let's add a Methyl group to the third position. |
| Click on Add a bond or change the multiplicity of existing one tool >> click on the position. | Click on Add a bond or change the multiplicity of existing one tool.
Click on the position. Observe the change in the atoms. <Pause> |
| Click on Add a chain tool.
Click on the position. |
Let's add an ethyl group on the fifth position.
Click on Add a chain tool. Click on the position. |
| Next I will display atoms on all positions. | |
| Right click on the position>> A Submenu opens>>Select Atom>> click on Display symbol. | Right-click on the position.
A Submenu opens Select Atom and then click on Display symbol. |
| Let's see how many times we can branch at one position. | |
| Click on Add a bond or change the multiplicity of existing one tool.
Click on fourth position to branch the carbon chain. Click again. |
Click on Add a bond or change the multiplicity of existing one tool.
Click on fourth position to branch the carbon chain. Click again. Observe the branching in carbon chain. |
| Point to the poistion. | Let's try to click for the third time.
We do not see the branching. |
| Note that branching is possible only twice at each position.
This is because it satisfies carbon's tetra valency. | |
| Press CTRL+ S. | To save the file, Press CTRL+ S. |
| In the Save as dialog box>>
Enter the file name as Alkyl groups >> click on Save button. |
In the Save as dialog box,
enter the file name as Alkyl groups. Click on Save button. <PAUSE> |
| Slide Number 7
Summary |
In this tutorial we have learnt,
Add and modify structure of compounds Change current element Add Alkyl groups Add and modify carbon chain |
| Slide Number 8
Assignment Draw Octane structure . Add Propyl and Butyl groups at the fourth and fifth positions of the chain. Your completed assignment should look like this. | |
| Slide Number 9
Acknowledgement |
Watch the video available at this URL.
http://spoken-tutorial.org/What_is_a_Spoken_Tutorial It summarises the Spoken Tutorial project If you do not have good bandwidth, you can download and watch it |
| Slide Number 10 | The Spoken Tutorial Project Team:
Conducts workshops using spoken tutorials Gives certificates to those who pass an online test For more details, please write to contact@spoken-tutorial.org |
| Slide number 11 | Spoken Tutorial Project is a part of the Talk to a Teacher project
It is supported by the National Mission on Education through ICT, MHRD, Government of India More information on this Mission is available at this link http://spoken-tutorial.org/NMEICT-Intro ] Animation are done by Udhaya Chandrika. This is Madhuri Ganpathi from IIT Bombay signing off. Thank you for joining. |
