Jshek
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#1
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#1
Can someone teach me how they got R and R for first and second stereogenic centre I’m so lost for example 1
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Jshek
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#2
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#2
Name:  8A58AD2D-9637-455C-A9EF-E7A6F509B3D8.jpeg
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charco
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#3
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#3
(Original post by Jshek)
Can someone teach me how they got R and R for first and second stereogenic centre I’m so lost for example 1
Can someone teach me how to rotate images through 90º so that they are readable without neck injury?
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charco
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#4
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#4
Position the stereo-centre so that the lowest priority group is at the back.

The other three groups now form a circle. Order them in terms of priority. If the order of decreasing priority is clockwise the chiral centre is "R" (rectus = right handed).

If the order shows an anticlockwise rotation it is designated "S" for sinister = left handed.

Name:  RS1.png
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Name:  RS2.png
Views: 12
Size:  78.3 KB
Name:  RS3.png
Views: 12
Size:  29.8 KB
Name:  RS4.png
Views: 13
Size:  66.4 KB
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Jshek
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#5
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#5
(Original post by charco)
Position the stereo-centre so that the lowest priority group is at the back.

The other three groups now form a circle. Order them in terms of priority. If the order of decreasing priority is clockwise the chiral centre is "R" (rectus = right handed).

If the order shows an anticlockwise rotation it is designated "S" for sinister = left handed.

Name:  RS1.png
Views: 13
Size:  89.2 KB
Name:  RS2.png
Views: 12
Size:  78.3 KB
Name:  RS3.png
Views: 12
Size:  29.8 KB
Name:  RS4.png
Views: 13
Size:  66.4 KB
Name:  image.jpg
Views: 13
Size:  164.5 KB
I got a for sterogenic centre 2
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Jshek
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#6
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#6
(Original post by Jshek)
Name:  image.jpg
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I got a for sterogenic centre 2
S*
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charco
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#7
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#7
(Original post by Jshek)
Name:  image.jpg
Views: 13
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I got a for sterogenic centre 2
Can't you post your images the right way up, it would make life a lot easier!
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charco
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#8
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#8
(Original post by Jshek)
S*
Actually, I just noticed that there are 2 typos in the images. I have put anticlockwise = R, when it should be "S".
Updated here:
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