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., and White, Allan H. (2001) New linked macrocycle systems. Interaction of palladium(II) and platinum(II) with tri-linked N2S2-donor macrocycles and their single-ring analogues. Dalton Transactions, 19. pp. 2801-2806.

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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.

Item ID: 13172
Item Type: Article (Research - C1)
ISSN: 1477-9234
Keywords: linked macrocycle; trinuclear complexes
Date Deposited: 28 Feb 2013 03:57
FoR Codes: 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030207 Transition Metal Chemistry @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 100%
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