Gas-phase C-S bond cleavage and crown opening versus nitrogen heterocycle loss from Ru-II complex ions with 1,4,7,10-tetrathiacyclododecane and bidentate diimines

abstract

Anew series of ruthenium(II) complexes with the general formula [Ru-II([12]aneS(4))(NN)]X-2, where NN are bidentatediimines, [12]aneS(4) is 1,4,7,10-tetrathiacyclododecane, and X is Cl- or PF6-, were studied by electrospray mass spectrometry (ESMS). Thiacrown fragmentation and intact diimine loss are the two major types of gas-phase reactions observed. The diimine losses occur mainly from the ion pairs formed by the inner sphere cations with halogen anions and are more significant for the complexes with flexible cross-bridged diimines. The fragmentations occur predominantly without changes in the oxidation state of the metal centre. (c) 2005 Elsevier B.V. All rights reserved.

keywords

ELECTROSPRAY MASS-SPECTROMETRY; FAST-ATOM-BOMBARDMENT; COLLISIONALLY ACTIVATED DISSOCIATION; TRANSITION-METAL COMPLEXES; MIXED-LIGAND COMPLEXES; RUTHENIUM(II) COMPLEXES; AMINO-ACIDS; STEREOCHEMICAL DIFFERENTIATION; ORGANOMETALLIC CHEMISTRY; MOLECULE REACTIONS

subject category

Physics; Spectroscopy

authors

Izquierdo, RA; Barros, CMF; Amado, FML; Santana-Marques, MGO; Ferrer-Correia, AJ; Madureira, J; Santos, TM; Felix, V

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