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The suprachelate effect: a pathway to supramolecules with Cu(II) and ethylenediamine.
The suprachelate effect: a pathway to supramolecules with Cu(II) and ethylenediamine.
- Source :
- Supramolecular Chemistry; Nov/Dec2023, Vol. 34 Issue 11/12, p520-529, 10p
- Publication Year :
- 2023
-
Abstract
- This paper portrays the solution-phase dynamics as copper(II) and ethylenediamine explore a multitude of different complexes. The data from five spectrophotometric titrations were globally analysed, evidencing four predominant species ([Cu]<superscript>2+</superscript>, [Cu(en-N,N')]<superscript>2+</superscript>, [Cu(en-N,N')<subscript>2</subscript>]<superscript>2+</superscript>, [Cu(en-N)<subscript>4</subscript>]<superscript>2+</superscript>) along with their molar absorptivity curves and associative binding constants. The data also seem to support a fifth species, [Cu<subscript>2</subscript>(µ-en-N,N')]<superscript>4+</superscript>, in which ethylenediamine bridges two Cu(II) centres. The thermodynamic stability of all five species is corroborated by ab initio computational calculations. The potential existence of [Cu(en-N)<subscript>4</subscript>]<superscript>2+</superscript> highlights the suprachelate effect – going beyond the chelate effect – where multidenticity is overtaken by monodenticity. Such dangling multidentate ligands are available to bind to additional metal centres and thus build towards self-assembling supramolecules. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10610278
- Volume :
- 34
- Issue :
- 11/12
- Database :
- Complementary Index
- Journal :
- Supramolecular Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 181568486
- Full Text :
- https://doi.org/10.1080/10610278.2024.2410768