GChemPaint/C2/Editing-molecules/English

Visual Cue	Narration
Slide Number 1	Hello everyone. Welcome the tutorial on Editing Molecules in GChemPaint.
Slide Number 2 Learning Objectives	In this tutorial, we will learn to Add unbound electrons on an atom Draw Carbonic acid and Sulphuric acid structures. Add and modify a local charge on a group of atoms Add and modify a local charge on an atom Add cyclic molecules Convert monocyclic molecules to bicyclic 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 draw an Ammonia structure.
Point to Periodic table combo button.	For this I will use the Periodic table combo button.
Click on Current element drop down arrow button.	Click on Current element drop down arrow button.
Select 'N from the table.	Select N from the table.
Point to N	Observe N in the tool box.
Click on Add or modify an atom tool>> click on Display area.	Click on Add or modify an atom tool. Then click on Display area.
Point to NH3	Observe NH3 on the Display area.
Press capital H. Point to the Submenu.	Press capital H. A Submenu with a list of elements starting with H appears.
Select H from the list.	Select H from the list.
Click on Add a bond or change the multiplicity of the existing one tool>>Click thrice on the Nitrogen atom.	Click on Add a bond or change the multiplicity of the existing one tool. Click and drag the bond thrice on Nitrogen atom.
Point to the bonds	Orient the three bonds to form a Pyramid like structure.
	Let's add a pair of unbound electrons on Nitrogen atom.
Click on Add an electron pair to an atom tool>> click on the Nitrogen atom.	Click on Add an electron pair to an atom tool. Then click on Nitrogen atom of Ammonia. Observe the changes.
Point to the unbound electrons.	Note that Nitrogen of Ammonia has a pair of electrons that do not take part in bonding. This pair of electrons is lone pair.
	Let's now draw 'Carbonic acid(H2CO3) and Sulphuric acid(H2SO4) structures on the same window.
Slide Number Structures of Carbonic acid and Sulphuric acid.	Here is a slide for the structures of Carbonic acid and Sulphuric acid.
	Let's move Ammonia(NH3) structure to aside.
Click on Select one or more objects tool>>Click on the structure and drag to aside	Click on Select one or more objects tool. Click on the structure and drag to aside
	Let's first draw Carbonic acid structure.
Click on the Current element arrow button>>Select C from the table.	Click on the Current element arrow button. Select C from the table.
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.
Click on the Display area. Point to the orientation	Click on the Display area. Orient three bonds in such a way that they form an inverted Y.
Point to the fourth bond.	Let's draw fourth bond as a double bond to any one of the bonds.
Click on Periodic table Combo button	Now click on Periodic table Combo button
Select O.	Select O.
Click on Add or modify an atom tool	Click on Add or modify an atom tool
Point to the cursor.	Place the cursor near the bonds.
Click on the bond positions.	Click on the three bond positions. Carbonic acid(H2CO3) structure is drawn.
	Let's draw the Sulphuric acid structure.
Click on Periodic table Combo button.	Click on Periodic table Combo button.
Select S	Select S
Click on Add or modify an atom tool>>Click on the Display area. Point to H2S.	Click on Add or modify an atom tool. Click on the Display area. Observe H2S.
Press capital O A Submenu with O and Os opens.	Press capital O A Submenu with O and Os opens.
Select O.	Select O.
Click on Add or modify an atom tool>> click on Add a bond or change the multiplicity of the existiing one tool.	Click on Add or modify an atom tool. Then click on Add a bond or change the multiplicity of the existing one tool.
Click on H2S to draw the three bonds of OH to S.	Click on H2S to draw the three bonds of OH to S.
Click on S and drag the bond to a side without releasing the mouse.	To draw the fourth OH bond, click on S and drag the bond to a side without releasing the mouse.
	Let's convert the opposite OH bonds as double bonds as shown in the slide.
Click on Add a bond or change the multiplicity of the existiing one tool>>click on the existing bonds.	Click on Add a bond or change the multiplicity of the existing one tool. Then click on the opposite existing bonds of the structure. Sulphuric acid structure is drawn.
	Next let's add a local charge on the Carbonic acid and Sulphuric acid structures.
Click on Decrement the charge of an atom tool.	To show local charge on Carbonic acid. Click on Decrement the charge of an atom tool.
Click on two O-H groups.	Click on the two O-H groups of the Carbonic acid. Observe that Carbonate ion is formed.
Click on Decrement the charge of an atom tool.	To show local charge on Sulphuric acid structure. Click on Decrement the charge of an atom tool.
Click on the two opposite O-H groups.	Click on the two opposite O-H groups of Sulphuric acid. Observe that Sulphate is formed.
Slide Number 5 Assignment	* Draw Nitric acid structure(HNO3) Show the local charge on the Nitrate ion(NO3-) Your output should look like this.
	Let's now show the charges on Sodium and Chlorine atoms.
Press capital N'. Point to the Submenu	Press capital N'. A Submenu opens in which let's select Na.
Click on Add or modify an atom tool>>Click on the Display area.	Click on Add or modify an atom tool. Click on the Display area. Na atom is displayed on the Display area.
Click on Increment the charge of a atom tool>>Click on Na.	Click on Increment the charge of an atom tool. Then Click on Na. Observe a positive charge on the Sodium atom.
Point to the list	Likewise press capital C. A Submenu opens in which let's select Cl.
Click on the 'Display area.	Click on the Display area. Observe HCl on the Display area.
Click Decrement the charge of a atom tool>>Click on HCl.	Click Decrement the charge of an atom tool. Click on HCl. Observe a negative charge on the Chlorine atom.
Click on Periodic table combo button.	Let's change the current element to Carbon. Click on Periodic table combo button.
	Now let's learn to draw Cyclic molecules.
Click on Create a new file icon on the toolbar.	Let's open a new window. Click on Create a new file icon on the toolbar.
Point to the tool box Point to differenet tools	Observe different cycle tools on tool box. Add a three membered cycle Add a four membered cycle Add a five membered cycle Add a six membered cycle Add a seven membered cycle Add a eight membered cycle Add a cycle.
	Let's now add a four membered cycle to the Display area.
Click on Add a four membered cycle tool>>Click on the Display area.	Click on Add a four membered cycle tool. Click on the Display area.
	Let's now add atoms to the cycle at the corners.
Right click on any one of the corners>>A Submenu opens.	Right click any one of the corners. A Submenu opens.
Select Atom>>Then click on Display symbol.	Select Atom. Then click on Display symbol.
Point to the corners.	Likewise let's add atoms on all the corners. Obtained structure is Cyclobutane.
	Let's now convert a monocyclic compoud to bicyclic compoud.
Click on Add a six membered cycle tool>> click on the Display area.	Click on Add a six membered cycle tool. Then click on the Display area.
Click on the cycle bond	Place the cursor on the cycle's bond and click again. Observe the Bicyclic compound.
Click on Save the current file icon on the toolbar.	To save the file, Click on Save the current file icon on the toolbar.
Save as dialog box opens.	Save as dialog box opens.
Enter the filename as Editing Molecules>>Click on Save button.	Enter the filename as Editing Molecules Click on Save button.
	Let's summarize what we have learnt.
Slide Number 6 Summary	In this tutorial, we have learnt to, Add ubound electrons on an atom Draw Carbonic acid and Sulphuric acid structures. Add and modify a local charge on a group of atoms Add and modify a local charge on an atom Add cyclic molecules Convert monocyclic molecules to bicyclic molecules.
Slide Number 7 Assignment	As an assignment Add cycloheptane ring to the Display area Change it to tricyclic compound. Your completed assignment's output should look like this.
Slide Number 8 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 9	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 10	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, PoojaMoolya