Definition of diastereoisomer in English:

diastereoisomer

nounˌdʌɪəstɛrɪəʊˈʌɪsəməˌdīəˌsterēōˈīsəmər

Chemistry

Each of a pair of stereoisomeric compounds that are not mirror images of one another.
〔化〕非对映异构体
Example sentencesExamples
- It has five chiral carbons and only the naturally occurring diastereoisomer is biologically active.
- Because of the presence of two chiral carbon atoms in the dioxolane linker, the chemical synthesis route leads to two distinct diastereoisomers, in which the linkers are respectively SS and RR.
- The metal ion holds the reacting molecules close together, and may control the stereochemistry of the reaction so that only a particular diastereoisomer is produced.
- The adduct 6 was a single diastereoisomer while 5 was a mixture of diastereoisomers.
- The precipitated diastereoisomer was pressed out and washed with approx.20 l of ice-cold 2-propanol.

Derivatives

diastereoisomeric

adjectiveˌdʌɪəstɛrɪəʊʌɪsəˈmɛrɪk

Chemistry

Whilst most of the discussion has been about diastereoisomeric salts, it does not have to be so.
Example sentencesExamples
- The replacement of ethyl with phenyl in the sec-butyl ester group does not result in diastereoisomeric excess.
- The reaction of oxygen uptake by Co complexes with a group of diastereoisomeric dipeptides, consisting of alanine and leucine in various chiral forms, has been studied in an aqueous solution.
- Both 9 and 10 have four stereogenic centers giving rise to diastereoisomeric compounds existing as mixtures of two racemates.
- Two diastereoisomeric forms, respectively SS and RR, of chemically modified channels in which a dioxolane ring links the formylated N-termini of two gramicidin monomers, were shown to form ion channels.

Definition of diastereoisomer in US English:

diastereoisomer

nounˌdīəˌsterēōˈīsəmər

Chemistry

Each of a pair of stereoisomeric compounds that are not mirror images of one another.
〔化〕非对映异构体
Example sentencesExamples
- Because of the presence of two chiral carbon atoms in the dioxolane linker, the chemical synthesis route leads to two distinct diastereoisomers, in which the linkers are respectively SS and RR.
- It has five chiral carbons and only the naturally occurring diastereoisomer is biologically active.
- The metal ion holds the reacting molecules close together, and may control the stereochemistry of the reaction so that only a particular diastereoisomer is produced.
- The precipitated diastereoisomer was pressed out and washed with approx.20 l of ice-cold 2-propanol.
- The adduct 6 was a single diastereoisomer while 5 was a mixture of diastereoisomers.

词汇	diastereoisomer
释义	Definition of diastereoisomer in English: diastereoisomer nounˌdʌɪəstɛrɪəʊˈʌɪsəməˌdīəˌsterēōˈīsəmər Chemistry Each of a pair of stereoisomeric compounds that are not mirror images of one another. 〔化〕非对映异构体 Example sentencesExamples It has five chiral carbons and only the naturally occurring diastereoisomer is biologically active. Because of the presence of two chiral carbon atoms in the dioxolane linker, the chemical synthesis route leads to two distinct diastereoisomers, in which the linkers are respectively SS and RR. The metal ion holds the reacting molecules close together, and may control the stereochemistry of the reaction so that only a particular diastereoisomer is produced. The adduct 6 was a single diastereoisomer while 5 was a mixture of diastereoisomers. The precipitated diastereoisomer was pressed out and washed with approx.20 l of ice-cold 2-propanol. Derivatives diastereoisomeric adjectiveˌdʌɪəstɛrɪəʊʌɪsəˈmɛrɪk Chemistry Whilst most of the discussion has been about diastereoisomeric salts, it does not have to be so. Example sentencesExamples The replacement of ethyl with phenyl in the sec-butyl ester group does not result in diastereoisomeric excess. The reaction of oxygen uptake by Co complexes with a group of diastereoisomeric dipeptides, consisting of alanine and leucine in various chiral forms, has been studied in an aqueous solution. Both 9 and 10 have four stereogenic centers giving rise to diastereoisomeric compounds existing as mixtures of two racemates. Two diastereoisomeric forms, respectively SS and RR, of chemically modified channels in which a dioxolane ring links the formylated N-termini of two gramicidin monomers, were shown to form ion channels. Definition of diastereoisomer in US English: diastereoisomer nounˌdīəˌsterēōˈīsəmər Chemistry Each of a pair of stereoisomeric compounds that are not mirror images of one another. 〔化〕非对映异构体 Example sentencesExamples Because of the presence of two chiral carbon atoms in the dioxolane linker, the chemical synthesis route leads to two distinct diastereoisomers, in which the linkers are respectively SS and RR. It has five chiral carbons and only the naturally occurring diastereoisomer is biologically active. The metal ion holds the reacting molecules close together, and may control the stereochemistry of the reaction so that only a particular diastereoisomer is produced. The precipitated diastereoisomer was pressed out and washed with approx.20 l of ice-cold 2-propanol. The adduct 6 was a single diastereoisomer while 5 was a mixture of diastereoisomers.
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