molecularityn.

Brit.

/məˌlɛkjᵿˈlarᵻti/, U.S.

/məˌlɛkjəˈlɛrədi/

Origin: Formed within English, by derivation. Etymons: molecular adj., -ity suffix.

Etymology: < molecular adj. + -ity suffix.

1. The property or state of being molecular or composed of molecules; molecular agencies generally. Also in extended use.

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the world > matter > chemistry > atomic chemistry > [noun] > molecules > quality or state of

molecularity1842

1842 Penny Cycl. XXIV. 335/2 Theories of molecularity.

1871 H. Marshall For very Life I. i. xvii. 123 Human will has knit particles together as close and tight as molecularity could.

1892 Mind 1 238 We must point out..the relative nature of the molecularity ascribed to these propositions.

1923 Jrnl. Philos. 20 715 Above this level, atoms combine to form new units, the distinguishing quality of which is molecularity.

1964 Proc. Royal Soc. B. 160 155 As acceptance of molecularity became general, attempts were made..to calculate the number of molecules in a cell.

1975 Philos. Trans. (Royal Soc.) B. 270 310 The theory neglects consequences of discreteness and molecularity in the solvent, ions, and fixed charges.

1988 Philos. Q. 38 520 He will hold that no sharp line can be drawn between empirical statements which have cognitive content and logical truths which have none... He will have no ground for accepting the requirement of molecularity.

1988 Ethics 98 570 Ainslie calls his level of analysis ‘picoeconomics’, a step down the ladder of molecularity from the microeconomics of standard economic analysis.

2. Chemistry. The number of reacting molecules involved in a single (postulated or actual) step of a chemical reaction.

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the world > matter > chemistry > chemical reactions or processes > [noun] > molecularity

molecularity1939

1939 R. H. Fowler & E. A. Guggenheim Statist. Thermodynamics xii. 500 In general there is no simple connection between the molecularity of the mechanism..and the order of the reaction.

1950 K. J. Laidler Chem. Kinetics iii. 56 Whereas the order of a reaction is deduced directly from the experimental results, the molecularity can be determined only on the basis of additional arguments about which there is sometimes some uncertainty.

1970 M. Prettre & B. Claudel Elem. Chem. Kinetics v. 64 If we accept that the reaction I₂ + H₂→2HI is a simple one, this means that it involves a molecule of iodine and a molecule of hydrogen and that consequently its molecularity is two.

1988 P. W. Kuchel et al. Schaum's Outl. Theory & Probl. Biochem. ix. 226 Molecularity refers to the number of molecules involved in an elementary reaction.

This entry has been updated (OED Third Edition, September 2002; most recently modified version published online March 2022).

单词	molecularity
释义	molecularityn. Brit. /məˌlɛkjᵿˈlarᵻti/, U.S. /məˌlɛkjəˈlɛrədi/ Origin: Formed within English, by derivation. Etymons: molecular adj., -ity suffix. Etymology: < molecular adj. + -ity suffix. 1. The property or state of being molecular or composed of molecules; molecular agencies generally. Also in extended use. ΘΚΠ the world > matter > chemistry > atomic chemistry > [noun] > molecules > quality or state of molecularity1842 1842 Penny Cycl. XXIV. 335/2 Theories of molecularity. 1871 H. Marshall For very Life I. i. xvii. 123 Human will has knit particles together as close and tight as molecularity could. 1892 Mind 1 238 We must point out..the relative nature of the molecularity ascribed to these propositions. 1923 Jrnl. Philos. 20 715 Above this level, atoms combine to form new units, the distinguishing quality of which is molecularity. 1964 Proc. Royal Soc. B. 160 155 As acceptance of molecularity became general, attempts were made..to calculate the number of molecules in a cell. 1975 Philos. Trans. (Royal Soc.) B. 270 310 The theory neglects consequences of discreteness and molecularity in the solvent, ions, and fixed charges. 1988 Philos. Q. 38 520 He will hold that no sharp line can be drawn between empirical statements which have cognitive content and logical truths which have none... He will have no ground for accepting the requirement of molecularity. 1988 Ethics 98 570 Ainslie calls his level of analysis ‘picoeconomics’, a step down the ladder of molecularity from the microeconomics of standard economic analysis. 2. Chemistry. The number of reacting molecules involved in a single (postulated or actual) step of a chemical reaction. ΘΚΠ the world > matter > chemistry > chemical reactions or processes > [noun] > molecularity molecularity1939 1939 R. H. Fowler & E. A. Guggenheim Statist. Thermodynamics xii. 500 In general there is no simple connection between the molecularity of the mechanism..and the order of the reaction. 1950 K. J. Laidler Chem. Kinetics iii. 56 Whereas the order of a reaction is deduced directly from the experimental results, the molecularity can be determined only on the basis of additional arguments about which there is sometimes some uncertainty. 1970 M. Prettre & B. Claudel Elem. Chem. Kinetics v. 64 If we accept that the reaction I₂ + H₂→2HI is a simple one, this means that it involves a molecule of iodine and a molecule of hydrogen and that consequently its molecularity is two. 1988 P. W. Kuchel et al. Schaum's Outl. Theory & Probl. Biochem. ix. 226 Molecularity refers to the number of molecules involved in an elementary reaction. This entry has been updated (OED Third Edition, September 2002; most recently modified version published online March 2022). < n.1842
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