2004
DOI: 10.1002/ange.200301728
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Stabilität und Coulomb‐Explosion mehrfach geladener Ionen in der Gasphase

Abstract: Stabil trotz hoher Ladung: Mehrfach geladene Ionen kompensieren die starke Coulomb‐Abstoßung der Ladungszentren durch faszinierende Bindungsmuster. In Molekularstrahlexperimenten gelang nun die Erzeugung kleiner mehrfach geladener Anionen wie [Cr(SCN)4]2− und die Analyse ihres Fragmentierungsverhaltens (siehe Schema).

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Cited by 22 publications
(11 citation statements)
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“…Further, we note that the two monocations are formed in a ratio of m/z = 177 and 74 of approximately 6 to 1, whereas, reaction 15 implies these monocations to be produced in equal quantities. However, this intensity difference reflects the significant instrumental discrimination of the lighter fragment in dication dissociation [57,58]. At increased collision energy (E CM = 5.2 eV, Fig.…”
Section: Mixed Complexes Of Ni(ii) With Ethylenediamine and Dmfmentioning
confidence: 94%
See 1 more Smart Citation
“…Further, we note that the two monocations are formed in a ratio of m/z = 177 and 74 of approximately 6 to 1, whereas, reaction 15 implies these monocations to be produced in equal quantities. However, this intensity difference reflects the significant instrumental discrimination of the lighter fragment in dication dissociation [57,58]. At increased collision energy (E CM = 5.2 eV, Fig.…”
Section: Mixed Complexes Of Ni(ii) With Ethylenediamine and Dmfmentioning
confidence: 94%
“…Nitrogen was used as nebulizing and drying gas at a source temperature of 90 • C. The mass range examined in this study was usually 30-1000 (m/z). All mass-to-charge ratios (m/z) given below refer to the most abundant 58 Ni isotope.…”
Section: Methodsmentioning
confidence: 99%
“…[16] However, studies on the gas-phase reactions of dicationic complexes [M·B] 2 + are still not common, because of difficulties in generating thermodynamically or kinetically stable dications in the gas phase. [17,18] The bonds in B within the [M·B] 2 + complex are activated and, under typical mass spectrometry conditions, it is normal to observe spontaneous loss of a proton from the base B. This limits the accessibility of the doubly charged [M·B] 2 + complex, and the unimolecular reactivity of the de-…”
Section: Ms Spectrum Of [Caa C H T U N G T R E N N U N G (Gly)]mentioning
confidence: 99%
“…In addition, these combinations of product ions are by + ), respectively. Although part of the available energy in a Coulomb explosion process will appear as kinetic energy of the fragments, [18] these fragment ions are likely to retain sufficient internal energy from the CID to undergo spontaneous unimolecular decompositions. The intensity differences mentioned above may then be attributed to the NH 2 CD 2 CO + and [Ca,C,O 2 ,H] + species decomposing by loss of CO (in either single-or two-step processes) into NH 2 CD 2 + (m/z 32) and CaOH + (m/z 57), respectively (Scheme 1 and Figure 8).…”
mentioning
confidence: 99%
“…[24] Conceptually, Reaction (1) may thus be regarded as a substitution reaction in which neutral argon reacts as a nucleophile and atomic fluorine as a leaving group. Although the dissociation of ArSiF 2 2+ into a pair of monocations (Ar + + SiF 2 + ) is exothermic by 0.72 eV, the Coulomb barrier inherently associated with charge separation [14,15,25] renders ArSiF 2 2+ a metastable dication and thus the first example of a covalent argon-silicon compound. The only related experimental report on gaseous noble gas silicon compounds deals with the electrostatic complexes Rg À SiF 3 + (Rg = Ar, Kr, Xe) and circumstantial evidence for the formation of FXeSiF 2 + ; [26] the existence of neutral FXeSiF has been predicted theoretically.…”
Section: +mentioning
confidence: 99%