enantiomer and the other molecule. Since the two activated complexes are enantiomeric,
their energies are the same and the rates of the reactions in which they are
formed must be the same (see Chapter 6). However, when an (R) enantiomer reacts
with a chiral molecule that has, say, the (R) configuration, the activated complex has
two chiral centers with configurations (R) and (R), while the activated complex
formed from the (S) enantiomer has the configurations (S) and (R). The two activated
complexes are diastereomeric, do not have the same energies, and consequently
are formed at different rates.
Although four is the maximum possible number of isomers when the compound
has two stereogenic centers (chiral compounds without a chiral carbon, or with one
chiral carbon and another type of stereogenic center, also follow the rules described
enantiomer and the other molecule. Since the two activated complexes are enantiomeric,their energies are the same and the rates of the reactions in which they areformed must be the same (see Chapter 6). However, when an (R) enantiomer reactswith a chiral molecule that has, say, the (R) configuration, the activated complex hastwo chiral centers with configurations (R) and (R), while the activated complexformed from the (S) enantiomer has the configurations (S) and (R). The two activatedcomplexes are diastereomeric, do not have the same energies, and consequentlyare formed at different rates.Although four is the maximum possible number of isomers when the compoundhas two stereogenic centers (chiral compounds without a chiral carbon, or with onechiral carbon and another type of stereogenic center, also follow the rules described
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enantiomer and the other molecule. Since the two activated complexes are enantiomeric,
their energies are the same and the rates of the reactions in which they are
formed must be the same (see Chapter 6). However, when an (R) enantiomer reacts
with a chiral molecule that has, say, the (R) configuration, the activated complex has
two chiral centers with configurations (R) and (R), while the activated complex
formed from the (S) enantiomer has the configurations (S) and (R). The two activated
complexes are diastereomeric, do not have the same energies, and consequently
are formed at different rates.
Although four is the maximum possible number of isomers when the compound
has two stereogenic centers (chiral compounds without a chiral carbon, or with one
chiral carbon and another type of stereogenic center, also follow the rules described
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