<div class="csl-bib-body">
<div class="csl-entry">Fleissner, S., Kirchner, K., & Pittenauer, E. (2024, May). <i>Tandem mass spectrometry of pincer ligands and their pincer complexes (Ni, Co): apparently the same precursor ions with a mass difference of one electron</i> [Conference Presentation]. 40th Informal Meeting on Mass Spectrometry, Budapest, Hungary.</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/209810
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dc.description.abstract
Today, organometallic pincer complexes constitute important tools in homogeneous catalysis in order to synthesize chemical building blocks apart from traditional harsh conditions in organic chemistry. During classical chemical synthesis of pincer complexes it was of interest to structurally characterize the pure ligands without the metal coordination center as well as the metal complexes. Unfortunately, due to the paramagnetic properties of such complexes, it turned out to be very difficult to obtain detailed structural information by nuclear magnetic resonance spectroscopy. As a powerful alternative for structural elucidation of those compounds either matrix-assisted laser desorption ionization mass spectrometry or electrospray ionization (ESI) mass spectrometry in combination with tandem mass spectrometry and accurate mass determination are meanwhile well-established techniques.
Initially, the fragmentation behavior of several mono- and bidentate pincer ligands was investigated by ESI low-energy CID in combination with tandem mass spectrometry and accurate mass determinations exhibiting fragmentation mainly either between the P-isopropyl or the N-P bond [1]. As an extension of our work several pincer complexes with nickel (II) and cobalt (II) chloride were measured by the same strategy. Both types of complexes readily ionize by loss of one chloride yielding abundant singly charged ions, which were selected for tandem mass spectrometric experiments. At first glance nickel and cobalt complexes containing the same pincer ligand exhibit an unexpected different fragmentation pattern making detailed interpretations rather difficult. Even accurate mass determinations did not help further. A careful look at the electron configuration of nickel and cobalt finally turned out that only cobalt (II) contains an odd number of electrons thus yielding as precursor ions for ⁵⁸Ni (II) [M−Cl]+ and for ⁵⁹Co (II) [M−Cl]+ •. Therefore, the corresponding product ion spectra are starting either with a pure cation (Ni) or a radical cation (Co) thus strongly influencing the subsequent fragmentation pattern, which will be discussed in detail.
en
dc.language.iso
en
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dc.subject
mass spectrometry
en
dc.title
Tandem mass spectrometry of pincer ligands and their pincer complexes (Ni, Co): apparently the same precursor ions with a mass difference of one electron
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.type.category
Conference Presentation
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tuw.researchTopic.id
M6
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tuw.researchTopic.name
Biological and Bioactive Materials
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tuw.researchTopic.value
100
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tuw.publication.orgunit
E163-01-1 - Forschungsgruppe Organometallische Chemie und Katalyse
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tuw.publication.orgunit
E164-01-1 - Forschungsgruppe Massenspektrometrische Bio- und Polymeranalytik
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tuw.author.orcid
0000-0002-3366-1468
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tuw.author.orcid
0000-0003-0872-6159
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tuw.author.orcid
0000-0002-8409-802X
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tuw.event.name
40th Informal Meeting on Mass Spectrometry
en
tuw.event.startdate
12-05-2024
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tuw.event.enddate
15-05-2024
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tuw.event.online
On Site
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tuw.event.type
Event for scientific audience
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tuw.event.place
Budapest
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tuw.event.country
HU
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tuw.event.presenter
Pittenauer, Ernst
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wb.sciencebranch
Chemie
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wb.sciencebranch.oefos
1040
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wb.sciencebranch.value
100
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item.languageiso639-1
en
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item.openairetype
conference paper not in proceedings
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item.grantfulltext
none
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item.fulltext
no Fulltext
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item.cerifentitytype
Publications
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item.openairecristype
http://purl.org/coar/resource_type/c_18cp
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crisitem.author.dept
E163-01-1 - Forschungsgruppe Organometallische Chemie und Katalyse
-
crisitem.author.dept
E163-01-1 - Forschungsgruppe Organometallische Chemie und Katalyse
-
crisitem.author.dept
E164-01-1 - Forschungsgruppe Massenspektrometrische Bio- und Polymeranalytik
-
crisitem.author.orcid
0000-0002-3366-1468
-
crisitem.author.orcid
0000-0003-0872-6159
-
crisitem.author.orcid
0000-0002-8409-802X
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crisitem.author.parentorg
E163-01 - Forschungsbereich Anorganische Chemie
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crisitem.author.parentorg
E163-01 - Forschungsbereich Anorganische Chemie
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crisitem.author.parentorg
E164-01 - Forschungsbereich Imaging und Instrumentelle Analytische Chemie
