formation constant

For a mononuclear binary complex, if a central atom (central group) M (the 'metal') and a ligand L have been defined, then in the following expressions $K n$ is the stepwise formation constant, and $β n$ is the cumulative formation constant for the complex ML_n. They can both be referred to as stability constants (stepwise and cumulative).

$K n = K ( ML n − 1 + L ⇌ ML n )$

$β n = K ( M + n L ⇌ ML n )$

Source:

Orange Book, p. 11

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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook.

Last update: 2014-02-24; version: 2.3.3.

DOI of this term: https://doi.org/10.1351/goldbook.F02485.

Original PDF version: http://www.iupac.org/goldbook/F02485.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.

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