Let's try to determine if the next substance has the configuration R or S:
What are the chemical functions?
For answers, use (possibly multiple times) the arrows ↑ and ↓ at the top! Complete please this question before moving on to the next one!
Aldehyd and alcohol
What is the scientific name (without configuration R or S)
2,3-dihydroxypropanal
Is there an asymmetric C atom ?
Here:
Four atoms or groups of different atoms are attached to it
Store these atoms in order (according to number Z of the periodic table)
$c(O)\gt d(C) \gt a(C) \gt b(H)$
Explain why $d \gt a$ !
In d: $C (O,O,H)$ In a: $C (O,H,H)$ In 2nd position: $O\gt H$
Order:
The least important atom (H) is well behind. What is the order of rotation (Clockwise) R or opposit S) of the three others ?
Name according Cahn, Ingold and Prelog !
R-2,3-dihydroxypropanal or (R)-2,3-dihydroxypropanal
