H goes to where more H's reside in mark, and the opposite is true of anti-mark stereoisomers pertains to difference in spatial 3D arrangement. D and L and R and S don't have any special relationship necessarily. We can't say a D sugar is R because D refers to the overall molecule where R denotes a specific chiral center glyceraldehyde is the exception here.
D sugars have the OH on the penultimate carbon on the right, and vice versa for L sugars. To consider chemoselectivity, you need to look at what the reagent is reacting with. Regioselectivity in chemistry is the preference of a chemical bond formation or a chemical bond breaking in one direction over all the other possible directions. Overview and Key Difference 2.
What is Chemoselectivity 3. What is Regioselectivity 4. Chemoselectivity vs Regioselectivity in Tabular Form 5. Summary — Chemoselectivity vs Regioselectivity. It may also refer to the selective reactivity of a particular functional group among other functional groups. This type of prediction depends on the molecular connectivity that is considered to be plausible. However, the physical outcome of this actual reaction tends to be ultimately dependent on a number of factors.
Practically, these factors are impossible to predict with any useful accuracy. These factors include solvent, atomic orbitals, etc. Moreover, chemoselectivity is a difficult property to predict. However, we can commonly observe selective outcomes in some cases that show many reactions that are plausible. A good example of this is selective organic reduction having great relative chemoselectivity of sodium borohydride reduction against the lithium aluminum hydride reaction.
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