dimern.

Brit.

/ˈdʌɪmə/, U.S.

/ˈdaɪmər/

Etymology: < di- comb. form + Greek μέρος share, part (after polymer).

Chemistry.

A compound related to some other compound by having twice the number of atoms of the various elements in its molecule; usually, a compound the molecule of which is a double molecule formed by the joining together of two identical molecules.

ΚΠ

1930 Jrnl. Amer. Chem. Soc. 52 320 From the distillate was isolated a very small amount..of a crystalline solid having the analytical composition of tetramethylene carbonate. Molecular weight determinations indicated that it is a dimer: COO(CH₂)₄OCOO(CH₂)₄O.

1951 S. Coffey tr. J. P. Wibaut Org. Chem. vii. 105 If two molecules of the monomer combine, the polymer so formed is called a dimer, if three molecules combine, a trimer..and so on.

1964 J. W. Linnett Electronic Struct. Molecules iii. 50 Let us consider the dimer of CN, namely cyanogen, C₂N₂.

1965 New Scientist 29 Apr. 291/1 An excited molecule can join with a ground-state molecule to form a new double molecule (or dimer).

This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2022).

单词	dimer
释义	dimern. Brit. /ˈdʌɪmə/, U.S. /ˈdaɪmər/ Etymology: < di- comb. form + Greek μέρος share, part (after polymer). Chemistry. A compound related to some other compound by having twice the number of atoms of the various elements in its molecule; usually, a compound the molecule of which is a double molecule formed by the joining together of two identical molecules. ΚΠ 1930 Jrnl. Amer. Chem. Soc. 52 320 From the distillate was isolated a very small amount..of a crystalline solid having the analytical composition of tetramethylene carbonate. Molecular weight determinations indicated that it is a dimer: COO(CH₂)₄OCOO(CH₂)₄O. 1951 S. Coffey tr. J. P. Wibaut Org. Chem. vii. 105 If two molecules of the monomer combine, the polymer so formed is called a dimer, if three molecules combine, a trimer..and so on. 1964 J. W. Linnett Electronic Struct. Molecules iii. 50 Let us consider the dimer of CN, namely cyanogen, C₂N₂. 1965 New Scientist 29 Apr. 291/1 An excited molecule can join with a ground-state molecule to form a new double molecule (or dimer). This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2022). < n.1930
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