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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.

Authors :
Lawler, Fenton C.
Storteboom, Ryan S.
Rosales-Lopez, Plinio D.
Selvaggio, Katherine J.
Zogg, Krista A.
Chen, Trevina
Heule, Dafna L.
Hoogstra, Madison N.
Daspit, Orin R.
Grabill, Magdalene A.
Stonehouse, Adelaide A.
Jipping, Anna E.
Baker, Aerin E.
Vander Griend, Douglas A.
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