Gas-phase fragmentation of coordination compounds: loss of CO2 from inorganic carbonato complexes to give metal oxide ions

Dalgaard, Pia; McKenzie, Christine J.

doi:10.1002/(sici)1096-9888(199910)34:10<1033::aid-jms862>3.0.co;2-s

Cited by 17 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Surprisingly cobalt(III) complexes of tpa or its derivatives are exceedingly rare -we can find only two previous examples: these are [Co(tpa)CO 3 ][PF 6 ], for which only mass spectroscopic data were reported [12], and [Co(tpa)(H 2 O)Cl](ClO 4 ), which was characterised by a partial elemental analysis and UV-Vis and 1 H NMR spectroscopic data [13]. Presumably the latter complex has an octahedral cobalt(III) centre with a N 4 ClO-donor set akin to [Co(tpaCO 2 )Cl](ClO 4 ).…”

supporting

confidence: 80%

An unusual but informative synthesis and the crystal structure of [Co(tpaCO2)Cl](ClO4) (tpaCO2−=6-carboxylato-2- (pyridylmethyl)-bis(2-pyridylmethyl)amine)

Lonnon

Craig

Colbran

2003

Inorganic Chemistry Communications

View full text Add to dashboard Cite

supporting

confidence: 80%

An unusual but informative synthesis and the crystal structure of [Co(tpaCO2)Cl](ClO4) (tpaCO2−=6-carboxylato-2- (pyridylmethyl)-bis(2-pyridylmethyl)amine)

Lonnon

Craig

Colbran

2003

Inorganic Chemistry Communications

View full text Add to dashboard Cite

“…Several studies8–12, 17, 18 have revealed that, based on the electronic state of the metal center, various types of reactions are possible in gas phase. Kojic acid has been shown to be an iron chelator in animal systems 19, 20.…”

Section: Resultsmentioning

confidence: 99%

“…Because of the ‘softness’ of ESI‐MS, it can be used to study the fragmentation of the coordination complexes 6, 7. The technique has also been extensively used to study iron coordination complexes 8–12. Ligands such as caffeic acid, chlorogenic acids, and narangin are capable of forming chelates with iron in solution 13.…”

mentioning

confidence: 99%

“…6,7 The technique has also been extensively used to study iron coordination complexes. [8][9][10][11][12] Ligands such as caffeic acid, chlorogenic acids, and narangin are capable of forming chelates with iron in solution. 13 In the gas phase, the iron-chelating properties of flavonoids were studied by ESI-MS and complexes with different stoichiometries of iron and flavonoids have been reported.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Probing the interaction of kojic acid antibiotics with iron(III) chloride by using electrospray tandem mass spectrometry

Sudhir¹,

Wu²,

Zhou³

2004

Rapid Comm Mass Spectrometry

View full text Add to dashboard Cite

Kojic acid, 5-hydroxy-2-(hydroxymethyl)-4H-pyran-4-one, has been used extensively as a clinical iron-chelating drug although the nature of the complexes of iron and kojic acid has not been established. In this article we demonstrate the complexation of kojic acid with iron(III) chloride by using electrospray ionization mass spectrometry (ESI-MS). The ESI-MS analysis revealed different reactions between iron(III) chloride and kojic acid (M), and the mass spectrum exhibited four complexes: [Fe+2(M-H)]+, [Fe+3(M-H)+H]+, [Fe2+4(M-H)+Cl]+, and [Fe2+5(M-H)]+. All these proposed complexes and the presence of chloride ion in one of the dinuclear complexes have been confirmed by isotopic patterns and fragmentation studies by means of tandem mass spectrometry (MSn).

show abstract

“…We have previously found that a diiron and a dicopper complex containing a µ-η 1 ,η 1 -CO 3 2Ϫ group (mode C) lose the mass equivalent to CO 2 under CA to generate unusual dinuclear oxide complexes. 37 The present series of carbonate complexes offers an opportunity to compare the gas-phase fragmentation of alternative carbonate bonding modes as well as the effect of encapsulation within a cryptand ligand. Fig.…”

Section: Electrospray Ionisation (Esi) Mass Spectrometrymentioning

confidence: 99%

Cascade chemistry in azacryptand cages: bridging carbonates and methylcarbonatesElectronic supplementary information (ESI) available: magnetic data. See http://www.rsc.org/suppdata/dt/b1/b110449g/

Dussart

Harding

Dalgaard

et al. 2002

J. Chem. Soc., Dalton Trans.

Self Cite

View full text Add to dashboard Cite

The different tendencies of dinuclear azacryptates of the m-CH 2 C 6 H 4 CH 2 and 2,5-furano-spaced hosts L 1 and L 2 to catalyse CO 2 uptake-reactions within these sterically-protected host cavities are examined. Bridging methylcarbonates are generated catalytically upon exposure of methanol solutions of L 1 , but not L 2 , di-transition cation cryptates to atmospheric CO 2 . X-Ray crystallographic structures of homodinuclear µ-carbonato cryptates of both ligands and µ-methylcarbonato cryptates of L 1 with later first transition series cations are reported. ESI-MS spectra show loss of H 2 CO 3 from µ-carbonato cryptates in collision activation experiments.The oxo-anion, carbonate, currently attracts attention in diverse areas of chemistry. Transformations involving this species, its reaction precursors and products are of considerable biological 1 significance; particularly important here are the carboanhydrases which play an essential role in processes such as photosynthesis, respiration, calcification and pH control. In the light of increasing concern about CO 2 build-up from fossil fuel consumption and potential resulting greenhouse effects, improved understanding of the biological handling of carbonate-related species acquires increasing urgency. Any potential new application of CO 2 as feedstock in chemical processes, will for this reason, attract much interest. In addition, the many and varied coordination modes of the carbonate oxo-anion are of spectroscopic interest as is their capacity to transmit magnetic interaction. 2-4 The carbonate system is also significant in the context of anion coordination chemistry as its behaviour within small molecule hosts may help to elucidate details of transport and location of carbonate or carboxylate anions in enzyme processes.The frequently used strategy of anion coordination via protonated amine, 5,6 or other acidic host, can be problematic in such pH-sensitive systems, so we have adopted an alternative strategy: the oxoanions here are retained via their bridging coordination of cations held within a cryptand cavity. We have already used the "cryptate as host" strategy to coordinate pseudo-halide anions such as azide and cyanate, and studied the spectroscopy and magnetochemistry 7,8 resulting from the consequent (and on first observation unprecedented) colinear M-NXY-M bridging geometry.The secondary coordination of anionic or other bridges between cations themselves coordinated by a cryptand host molecule was quite some time ago termed cascade coordination by Jean-Marie Lehn, 9 in the implicit expectation that the bridging groups might be activated, by reason of their dicoordination, toward further and possibly useful chemical reaction. However, such outcome was not apparent in our pseudo-halide † Electronic supplementary information (ESI) available: magnetic data. See http://www.rsc.org/suppdata/dt/b1/b110449g/

show abstract

Gas-phase fragmentation of coordination compounds: loss of CO2 from inorganic carbonato complexes to give metal oxide ions

Cited by 17 publications

References 17 publications

An unusual but informative synthesis and the crystal structure of [Co(tpaCO2)Cl](ClO4) (tpaCO2−=6-carboxylato-2- (pyridylmethyl)-bis(2-pyridylmethyl)amine)

An unusual but informative synthesis and the crystal structure of [Co(tpaCO2)Cl](ClO4) (tpaCO2−=6-carboxylato-2- (pyridylmethyl)-bis(2-pyridylmethyl)amine)

Probing the interaction of kojic acid antibiotics with iron(III) chloride by using electrospray tandem mass spectrometry

Cascade chemistry in azacryptand cages: bridging carbonates and methylcarbonatesElectronic supplementary information (ESI) available: magnetic data. See http://www.rsc.org/suppdata/dt/b1/b110449g/

Contact Info

Product

Resources

About