GChemPaint/C3/Aromatic-Molecular-Structures/English

VISUAL CUE	NARRATION
Slide Number 1 Title Slide	Hello everyone. Welcome to this tutorial on Aromatic Molecular Structures in GChemPaint.
Slide Number 2 Learning Objectives	In this tutorial, we will learn to convert Cyclohexane to Cyclohexene and Cyclohexane to Benzene We will also Create derivatives of Benzene Add atoms and group of atoms to Benzene ring and Merge two molecules
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.
Switch to GchemPaint application.	I have opened a new GChemPaint application.
	Let's first add a six membered cycle to the Display area.
Click on Add a six membered cycle tool>> Click on Display area.	Click on Add a six membered cycle tool. Click on the Display area.
Click on Add a bond or change the multiplicy of the existing one tool	Click on Add a bond or change the multiplicity of the existing one tool. Add two bonds on every corner of the cycle.
Click and drag the bonds to proper position.	Position the bonds in such a way that no two bonds touch each other. To do so, click and drag the bonds to proper position.
	Let's display carbon atoms at the corners of the cycle.
Right click on any one of the corner>>A sub-menu appears	Right click on any one of the corner. A sub-menu appears.
Select Atom >>click on Display symbol.	Select Atom and then click on Display symbol. Likewise I will add Carbon atoms at all the corners of the cycle.
Press capital H on the keyboard.	To add Hydrogen atoms to the bonds, Press H on the keyboard.
Click on Add or modify an atom tool>> Click on all the bond positions.	Click on Add or modify an atom tool Click on all the bond positions.
Point to the Hydrogen atoms.	Again, see to it that no two Hydrogen atoms overlap each other. The obtained structure is cyclohexane(C6H12).
	Let's copy and paste the structure
Press CTRL+A to select the structure >> Press CTRL+C to copy>>Press CTRL+V to paste	Press CTRL+A to select the structure. Press CTRL+C to copy and Press CTRL+V to paste.
Point to the structure.	Let's convert the second Cyclohexane structure to Cyclohexene.
Click on the Eraser tool >> delete one of the hydrogen bonds of the adjacent Carbon atoms.	Click on the Eraser tool. Delete one Hydrogen bond from each of the adjacent Carbon atoms.
Click on Add a bond or change the multiplicity of the existing one tool	Click on Add a bond or change the multiplicity of the existing one tool. Then click on alternate bonds of the cycle, between the deleted Hydrogen bonds.
Point to the structure.	The obtained structure is Cyclohexene(C6H10).
Slide Number 5 Assignment	Here is an assignment. Draw structures of Cyclobutane and Cyclopentane. Convert them to Cyclobutadiene and Cyclopentadiene structures. Your completed assignment should look like this.
	Let's clear the Display area.
Press CTRL+A to select the structures >> Press Delete key to delete	Press CTRL+A to select the structures. Press Delete key on the key board to delete.
	Next let's convert Cyclohexane to Benzene. Ensure that Current element is Carbon.
Click on Add a six membered cycle tool>> Click on Display area.	Click on Add a six membered cycle tool. Click on the Display area.
Click on Add a bond or change the multiplicity of the existing one tool>> Click on alternate bonds of the cycle.	Click on Add a bond or change the multiplicity of the existing one tool. Click on the alternate bonds and on all corners of the cycle.
	Let's add Hydrogen atoms to the bonds.
Press H on the keyboard.	Press H on the keyboard.
Click on Add or modify an atom tool>> Click on all the bond positions.	Click on Add or modify an atom tool Click on all the bond positions.
Point to the structure.	The Obtained structure is Benzene(C6H6).
	Let's now learn about Benzene derivatives.
Slide Number 6 Benzene Derivatives	Various chemical compounds can be derived from Benzene . This is done by replacing one or more of its hydrogen atoms with other functional groups. Hydrogen atoms can be replaced by F, Cl, Br, I and group of atoms like OH, NO2, CH3 and others.
	Let's copy and paste the Benzene structure twice on the Display area.
Press CTRL+A to select the object. Press CTRL+C to copy >> Press CTRL+V twice to paste.	Press CTRL+A to select the object. Press CTRL+C to copy and Press CTRL+V twice to paste.
Drag the overlapping structures aside	Position the structures side by side on the Display area.
	Let's replace Hydrogen atom of the first Benzene structure with F.
Press F on the keyboard.	Press F on the keyboard.
Click on Add or modify an atom tool>> Click on H to replace it with F. Click on Add or modify an atom tool.	Click on H to replace it with F. The structure obtained is Fluorobenzene.
	Next let's replace the hydrogen atom of the second Benzene with a group of atoms.
Click on Add or modify a group of atoms tool>> Click on the Hydrogen atom.	Click on Add or modify a group of atoms tool. Click on the Hydrogen atom.
Point to enclosed Hydrogen.	Observe that Hydrogen is enclosed in a green box with a blinking cursor.
Delete Hydrogen and type capital CH and 3.	Delete Hydrogen and type capital CH and 3 and click anywhere on the Display area. The obtained structure is Methylbenzene.
Click on the hydrogen of third Benzene structure.	Likewise let's click on the hydrogen of third Benzene structure.
Delete Hydrogen and type capital NO and 2 in a green box	Delete Hydrogen and type capital NO and 2 in a green box The obtained structure is Nitrobenzene.
Slide Number 7 Assignment	Here is an assignment. Draw six Benzene structures. Replace one of the Hydrogen atoms of Benzene with Cl, Br and I atoms. Likewise replace one of the Hydrogen atoms with OH, NH2 and C2H5 groups Your completed assignment should look like this.
	Now let's merge two structures.
Press CTRL+A to select all objects>> Press Delete key	To clear the Display area. Press CTRL+A to select all objects. Press Delete key on the Keyboard.
Click on the Add a four membered cycle tool>>Click on the Display area.	Click on the Add a four membered cycle tool. Press 'C' on your keyboard. Click on the Display area twice.
Click on Select one or more objects tool >> select the second structure.	Click on Select one or more objects tool to select the second structure.
Drag the structure and place it close to the first structure>> Press CTRL+A to select structures.	Drag the structure and place it overlapping the first structure. Press CTRL+A to select both the structures.
Click on Merge two molecules tool to merge the molecules.	Merge two molecules tool becomes active. Click on Merge two molecules tool to merge the molecules. Drag the structure to observe the merging. <pause>
	Let's summarize what we have learnt.
Slide Number 8 Summary	In this tutorial we have learnt to Convert Cyclohexane to Cyclohexene Convert Cyclohexane to Benzene Create derivatives of Benzene Add group of atoms to Benzene ring Merge two molecules
Slide Number 9 Assignment	As an assignment Merge two Benzene molecules Merge two Pentane structures Merge Cyclopentane and Cyclohexane Your completed assignment should look like this
Slide Number 10 Acknowledgement	Watch the video available at this URL. http://spoken-tutorial.org/What_is_a_Spoken_ Tutorial It summarizes the Spoken Tutorial project If you do not have good bandwidth, you can download and watch it
Slide Number 11	The Spoken Tutorial Project Team: Conducts workshops using spoken tutorials Gives certificates to those who pass an on-line test For more details, please write to contact@spoken-tutorial.org
Slide Number 12	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 ]
	This is Madhuri Ganapathi from IIT Bombay signing off. Thank you for joining.

Contributors and Content Editors

Madhurig, Nancyvarkey