Hard–soft interactions in early transition-metal thioether
macrocyclic chemistry: spectroscopic and extended X-ray absorption fine
structure studies on chromium(III) thioether
complexes

Pope, Simon J. A.; Champness, Neil R.; Reid, Gillian

doi:10.1039/a608332c

Cited by 15 publications

References 16 publications

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Electrospray mass spectrometric studies of the complexational behavior of maleonitrile thiacrown ethers with various metals

Starke

Fürstenberg

Müller

et al. 2006

Rapid Comm Mass Spectrometry

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Electrospray ionization was employed to study the mass spectrometric behavior of the maleonitrile tetrathiacrown ethers mn12S 4 (1) and mn13S 4 (2) and maleonitrile pentathiacrown ether mn15S 5 (3) and of their complexes with various metal salts (MX 2 , M --Pd, Pt, Ni, Co, Fe; X --Cl, CrCl 3 , Ni (BF 4 ESI has also been used to determine the binding constants for various complexes in solution. Absolute and relative binding energies of metal-containing complexes can be estimated on the basis of energy-variable collision-induced dissociation (CID) measurements. In this context, Brodbelt and co-workers studied the dissociation pattern of differently charged polyether, crown ether and polypyridyl transition metal complexes. 26,27 In general, these studies reveal that rearrangement reactions involving the loss of small neutrals from the large ligands or the loss of intact ligands from multi-ligand metal complexes are characteristic. [26][27][28][29][30] In the present paper we report on ESI-MS studies of complexes of the crown ethers mn12S 4 (1), mn13S 4 (2) and mn15S 5 (3) 24c (cf. Fig. 1) with first-row transition metals Cr(III), Fe(II), Co(II), Ni(II) and Cu(II) and second/third-row metals Pd(II), Pt(II), Cd(II) and the main group metal thallium. The CID spectra of these complexes were also examined to evaluate the stability of the different complex types. Finally, the fragmentation patterns of the present complexes were compared in order to correlate them with the diameter of the cations and their binding properties. EXPERIMENTAL SynthesesThe syntheses of crown ethers mn12S 4 (1), 24b mn13S 4 (2),

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