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Type: Artigo de periódico
Title: Sequential IRMPD of XGe(OEt)(4)(-) ions: Gas-phase synthesis of novel oxy-germanium anions
Author: XAVIER, Luciano A.
MALASPINA, Thaciana V.
MORGON, Nelson H.
Abstract: The gas-phase ion/molecule reactions of F(-) and EtO(-) with Ge(OEt)(4) yield readily and exclusively pentacoordinated complexes XGe(OEt)(4)(-) (X = F, EtO) at pressures in the 10(-8) T range as observed by FT-ICR techniques. These hypervalent species are prone to undergo sequential fragmentations induced by infrared multiphoton excitation that lead to a variety of germyl and germanate anions. In the case of FGe(OEt)(4)(-), three primary competitive channels are observed in the IRMPD process that can be identified as (EtO)(3)GeO(-), F(EtO)(2)GeO(-) and (EtO)(3)Ge(-). Ab initio calculations have been carried out to characterize the primary fragmentation paths induced by IRMPD and the most favorable structure of the resulting anions. The gas-phase acidity of a number of these germanium-containing ions have been estimated by bracketing experiments and by theoretical calculations. Germanate anions such as (EtO)(3)GeO(-) undergo some interesting reactions with H(2)S to give rise to anions such as (EtO)(3)GeS(-) and (EtO)(2)Ge(OH)S(-). (C) 2010 Elsevier B.V. All rights reserved.
Subject: Germanium tetraethoxide
Pentacoordinated Ge anions
Germanate anions
Germyl anions
Country: Holanda
Citation: INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, v.306, n.2/Mar, Special Issue, p.219-226, 2011
Rights: fechado
Identifier DOI: 10.1016/j.ijms.2010.11.019
Date Issue: 2011
Appears in Collections:IQ - Artigos e Outros Documentos

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