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Titolo:
Gas-phase properties and fragmentation behavior of cationic, dinuclear iron chloride clusters Fe2Cln+ (n=1-6)
Autore:
Schroder, D; Loos, J; Schwarz, H; Thissen, R; Dutuit, O;
Indirizzi:
Tech Univ Berlin, Inst Chem, D-10623 Berlin, Germany Tech Univ Berlin Berlin Germany D-10623 st Chem, D-10623 Berlin, Germany Univ Paris Sud, Chim Phys Lab, F-91405 Orsay, France Univ Paris Sud Orsay France F-91405 Chim Phys Lab, F-91405 Orsay, France
Titolo Testata:
INORGANIC CHEMISTRY
fascicolo: 13, volume: 40, anno: 2001,
pagine: 3161 - 3169
SICI:
0020-1669(20010618)40:13<3161:GPAFBO>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
GUIDED ION-BEAM; KINETIC METHOD; DISSOCIATION-ENERGIES; BOND-ENERGIES; THERMOCHEMICAL DETERMINATIONS; ELECTRONIC-STRUCTURE; COMPLEXES; STATE; DICHLORIDES; HYDROXIDES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Schroder, D Tech Univ Berlin, Inst Chem, Str 17 Juni 135, D-10623 Berlin, Germany Tech Univ Berlin Str 17 Juni 135 Berlin Germany D-10623 rmany
Citazione:
D. Schroder et al., "Gas-phase properties and fragmentation behavior of cationic, dinuclear iron chloride clusters Fe2Cln+ (n=1-6)", INORG CHEM, 40(13), 2001, pp. 3161-3169

Abstract

Sector-field mass spectrometry is used to probe the fragmentation patternsof cationic dinuclear iron chloride clusters Fe2Cln+ (n = 1-6). For the chlorine-rich, high-valent Fe2Cln+ ions (n = 4-6), losses of atomic and molecular chlorine prevail in the unimolecular and collision-induced dissociation patterns. Instead, the chlorine deficient, formally low-valent Fe2Cln+ clusters (n = 1-3) preferentially undergo unimolecular degradation to mononuclear FeClm+ ions. In addition, photoionization is used to determine IE(Fe2Cl6) = 10.85 +/- 0.05 eV along with appearance energy measurements for the production of Fe2Cl5+ and Fe2Cl4+ cations from iron(III) chloride vapor. Thecombination of the experimental results allows an evaluation of some of the thermochemical properties of the dinuclear Fe2Cln+ cations: e.g., Delta H-f(Fe2Cl+) = 232 +/- 15 kcal/mol, Delta H-f(Fe2Cl2+) 167 +/- 4 kcal/mol, Delta H-f(Fe2Cl3+) = 139 +/- 4 kcal/mol, Delta H-f(Fe2C4+) 113 +/- 4 kcal/mol, Delta H-f(Fe2Cl5+) = 79 +/- 5 kcal/mol, and Delta H-f(Fe2Cl6+) = 93 +/- 2kcal/mol. The analysis of the data suggests that structural effects are more important than the formal valency of iron as far as the Fe-CI bond strengths in the Fe2Cln+ ions are concerned.

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Documento generato il 12/07/20 alle ore 12:50:16