R/S nomenclature - Revision history

Karsten Theis at 14:32, 15 August 2020

Karsten Theis — Sat, 15 Aug 2020 14:32:32 GMT

←Older revision		Revision as of 14:32, 15 August 2020
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-	R and S are used to describe the stereochemistry at an sp<sup>3</sup> carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away from the viewer (as in the initial scenes), and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).	+	R and S are used to describe the [[stereochemistry]] at an sp<sup>3</sup> carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away from the viewer (as in the initial scenes), and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).

Karsten Theis at 15:24, 30 August 2019

Karsten Theis — Fri, 30 Aug 2019 15:24:40 GMT

←Older revision		Revision as of 15:24, 30 August 2019
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	!S configuration		!S configuration
	\|-		\|-
-	\|<applet load='' name='R' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an R-configuration because when substituent 4 is in the back, substituents 1 - 3 run clockwise.' scene='82/824489/Rconfig/3'/>	+	\|<applet load='' name='R' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an R-configuration because when substituent 4 is in the back, substituents 1 - 3 run clockwise.' scene='82/824489/Rconfig/4'/>
-	\|<applet load='' name='S' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run counterclockwise.' scene='82/824489/Sconfig/3'/>	+	\|<applet load='' name='S' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run counterclockwise.' scene='82/824489/Sconfig/4'/>
	\|}		\|}

	R and S are used to describe the stereochemistry at an sp<sup>3</sup> carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away from the viewer (as in the initial scenes), and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).		R and S are used to describe the stereochemistry at an sp<sup>3</sup> carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away from the viewer (as in the initial scenes), and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).

Karsten Theis at 14:32, 30 August 2019

Karsten Theis — Fri, 30 Aug 2019 14:32:57 GMT

←Older revision		Revision as of 14:32, 30 August 2019
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	\|}		\|}

-	R and S are used to describe the stereochemistry at an sp<sup>3</sup> carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away, and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).	+	R and S are used to describe the stereochemistry at an sp<sup>3</sup> carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away from the viewer (as in the initial scenes), and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).

Karsten Theis at 14:31, 30 August 2019

Karsten Theis — Fri, 30 Aug 2019 14:31:35 GMT

←Older revision		Revision as of 14:31, 30 August 2019
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-	R and S are used to describe the stereochemistry at an ~~sp3~~ carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away, and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).	+	R and S are used to describe the stereochemistry at an sp<sup>3</sup> carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away, and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).

Karsten Theis at 12:20, 30 August 2019

Karsten Theis — Fri, 30 Aug 2019 12:20:03 GMT

←Older revision		Revision as of 12:20, 30 August 2019
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	\|<applet load='' name='R' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an R-configuration because when substituent 4 is in the back, substituents 1 - 3 run clockwise.' scene='82/824489/Rconfig/3'/>		\|<applet load='' name='R' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an R-configuration because when substituent 4 is in the back, substituents 1 - 3 run clockwise.' scene='82/824489/Rconfig/3'/>
-	\|<applet load='' name='S' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run counterclockwise.' scene='82/824489/Sconfig/2'/>	+	\|<applet load='' name='S' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run counterclockwise.' scene='82/824489/Sconfig/3'/>
	\|}		\|}

	R and S are used to describe the stereochemistry at an sp3 carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away, and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).		R and S are used to describe the stereochemistry at an sp3 carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away, and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).

Karsten Theis at 12:18, 30 August 2019

Karsten Theis — Fri, 30 Aug 2019 12:18:02 GMT

←Older revision		Revision as of 12:18, 30 August 2019
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	!S configuration		!S configuration
	\|-		\|-
-	\|<applet load='' name='R' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an R-configuration because when substituent 4 is in the back, substituents 1 - 3 run clockwise.' scene='82/824489/Rconfig/2'/>	+	\|<applet load='' name='R' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an R-configuration because when substituent 4 is in the back, substituents 1 - 3 run clockwise.' scene='82/824489/Rconfig/3'/>
	\|<applet load='' name='S' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run counterclockwise.' scene='82/824489/Sconfig/2'/>		\|<applet load='' name='S' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run counterclockwise.' scene='82/824489/Sconfig/2'/>
	\|}		\|}

	R and S are used to describe the stereochemistry at an sp3 carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away, and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).		R and S are used to describe the stereochemistry at an sp3 carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away, and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).

Karsten Theis at 21:21, 29 August 2019

Karsten Theis — Thu, 29 Aug 2019 21:21:36 GMT

←Older revision		Revision as of 21:21, 29 August 2019
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	\|<applet load='' name='S' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run counterclockwise.' scene='82/824489/Sconfig/2'/>		\|<applet load='' name='S' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run counterclockwise.' scene='82/824489/Sconfig/2'/>
	\|}		\|}
		+
		+	R and S are used to describe the stereochemistry at an sp3 carbon center with four different substituents. First, each substituent is assigned a priority. Then, the priority 4 substituent is placed facing away, and the rotation going from 1 to 2 to 3 is considered. If it is clockwise, the configuration is (R), if counterclockwise, (S). You can rotate the model on the left and the right. It is impossible to orient them in a way that they superimpose perfectly. Thus, they are different molecules. If you inspect them closer, you will see that they are like image and mirror image, i.e. they are enantiomers (if we assume that the substituents are all different and are themselves achiral as they appear here).

Karsten Theis at 20:56, 29 August 2019

Karsten Theis — Thu, 29 Aug 2019 20:56:19 GMT

←Older revision		Revision as of 20:56, 29 August 2019
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	\|-		\|-
	\|<applet load='' name='R' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an R-configuration because when substituent 4 is in the back, substituents 1 - 3 run clockwise.' scene='82/824489/Rconfig/2'/>		\|<applet load='' name='R' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an R-configuration because when substituent 4 is in the back, substituents 1 - 3 run clockwise.' scene='82/824489/Rconfig/2'/>
-	\|<applet load='' name='S' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run counterclockwise.' ~~sscene~~='82/824489/Sconfig/2'/>	+	\|<applet load='' name='S' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run counterclockwise.' scene='82/824489/Sconfig/2'/>
	\|}		\|}

Karsten Theis at 20:55, 29 August 2019

Karsten Theis — Thu, 29 Aug 2019 20:55:37 GMT

←Older revision		Revision as of 20:55, 29 August 2019
Line 4:		Line 4:
	!S configuration		!S configuration
	\|-		\|-
-	\|<applet load='' name='R' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run ~~counterclockwise~~.' scene='82/824489/Rconfig/2'/>	+	\|<applet load='' name='R' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an R-configuration because when substituent 4 is in the back, substituents 1 - 3 run clockwise.' scene='82/824489/Rconfig/2'/>
-	\|<applet load='' name='S' size='300' frame='true' ~~scene~~='82/824489/Sconfig/2'/>	+	\|<applet load='' name='S' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run counterclockwise.' sscene='82/824489/Sconfig/2'/>
	\|}		\|}

Karsten Theis at 20:54, 29 August 2019

Karsten Theis — Thu, 29 Aug 2019 20:54:33 GMT

←Older revision		Revision as of 20:54, 29 August 2019
Line 4:		Line 4:
	!S configuration		!S configuration
	\|-		\|-
-	\|<applet load='' name='R' size='300' frame='true' scene='82/824489/Rconfig/1'/>	+	\|<applet load='' name='R' size='300' frame='true' caption='Carbon (gray) with four substituents (labeled by priority 1-4) shows an S-configuration because when substituent 4 is in the back, substituents 1 - 3 run counterclockwise.' scene='82/824489/Rconfig/2'/>
-	\|<applet load='' name='S' size='300' frame='true' scene='82/824489/Sconfig/1'/>	+	\|<applet load='' name='S' size='300' frame='true' scene='82/824489/Sconfig/2'/>
	\|}		\|}