New linked macrocycle systems. Interaction of palladium(II) and platinum(II) with tri-linked N2S2-donor macrocycles and their single-ring analogues

Atkinson, Ian M.;Chartres, Jy D.;Groth, Andrew M.;Lindoy, Leonard F.;Lowe, Mark P.;Meehan, George V.;Skelton, Brian W.;White, Allan H.

Ian Atkinson

Abstract

Palladium(II) and platinum(II) complexes of ligands incorporating three linked, 16-membered, N₂S₂-donor macrocycles, together with their single-ring analogues have been synthesised. The former complexes are of the form [M₃L](PF₆)₆ (where M = Pd or Pt, and L is a linked three-ring macrocyclic species incorporating a 1,3,5-'tribenzyl' or a phloroglucinol core). The X-ray structure determination of the single ring species [PdL](PF₆)₂ (where L is a single N-benzylated derivative of the N₂S₂-donor macrocycle) showed that the palladium is coordinated to all four donor atoms of the macrocycle in a 'square planar' manner. The electrospray mass spectra of the tri-linked metal-containing species show a series of multiply charged ions resulting from the loss of hexafluorophosphate counter ions and hydrogens, and corresponding to [M−nPF₆]ⁿ⁺ and [M−nPF₆−mH]^(n−m)+. Expansion of individual charged peaks revealed the expected wide mass range resulting from the presence of three metal ions, each of which possesses a number of isotopes. Spectrophotometric titrations confirm that 3 ∶ 1 (metal ∶ ligand) stoichiometries occur for the complexes of these tri-linked ligands in acetonitrile.

Journal

Dalton Transactions

Publication Name

Dalton Transactions

Volume

ISBN/ISSN

1477-9234

Edition

N/A

Issue

N/A

Pages Count

Location

N/A

Publisher

Royal Society of Chemistry

Publisher Url

N/A

Publisher Location

N/A

Publish Date

N/A

Url

N/A

Date

N/A

EISSN

N/A

DOI

10.1039/B104492N