2003
DOI: 10.1021/jp0358073
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Abstract: Electrospray ionization-mass spectrometry (ESI-MS) is used to investigate the complexation of nickel(II) by N, N-dimethylformamide (DMF) in different water/DMF mixtures. The types of solvated cations observed are independent of the solvent composition and are part of the series [Ni(DMF) n ] 2+ with n ) 2-6 and [Ni-(DMF) n X] + with n ) 1-4 (where X ) Cl, Br, NO 3 ). The number of ligands, n, and thus the extent of solvation depends on the cone voltage (U C ) of the ESI source. At low U C multiply ligated ions… Show more

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Cited by 41 publications
(43 citation statements)
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“…[14,15] In brief, the NiX + complexes were formed from millimolar solutions of NiX 2 in either methanol or water under relatively harsh ionization conditions (typical cone voltages are around 60-80 V). [16] After mass selection by means of Q1, the thermalized ions were exposed to react with the alkanes in the hexapole at room temperature and at pressures on the order of 10 À4 mbar; this is considered to correspond to nearly single-collision conditions. Ionic products were detected using Q2.…”
Section: Methodsmentioning
confidence: 99%
“…[14,15] In brief, the NiX + complexes were formed from millimolar solutions of NiX 2 in either methanol or water under relatively harsh ionization conditions (typical cone voltages are around 60-80 V). [16] After mass selection by means of Q1, the thermalized ions were exposed to react with the alkanes in the hexapole at room temperature and at pressures on the order of 10 À4 mbar; this is considered to correspond to nearly single-collision conditions. Ionic products were detected using Q2.…”
Section: Methodsmentioning
confidence: 99%
“…It is composed of atoms of a different nature, it has a greater volume, and thus it may contribute different information to a better understanding of the complexation. In the literature Ni(NO 3 ) 2 has been reported as one of the salts used in nickelácomplexationá [48].áInáaddition,áitáisáknownáthat itácanáactáasáaámonodentateáorábidentateáligandá [49], unlike the halide anions that function only as monodentate ligands. In this work, some nitrate complexes wereáobservedá(Tableá1)áwhich,áwhenácomparedáwith chloride and bromide complexes, the basic differences were the relative abundances, which were mostly very low in the nitrate case.…”
Section: Substitution Of the Solventmentioning
confidence: 99%
“…As NO 3 is an anionic ligand, after homolytic cleavage of the NOO bond, leading to radical NO 2 , the remaining oxygen coordinated to nickel might carry one more electron than the usual number of valence electrons, which must be transferred to the metal yielding a reduced metal species. It is well known that metal monoxide cations of late transition metals, such as nickel, are very reactive and capable of activation of various substrates, with possible subsequent occurrence of oxidation reactions andárearrangementsá [48].áThus,áitáisáacceptableátoáadmit that the ligand (Az-N 2 ) could be activated and attacked by the coordinate unit NiO ϩ , yielding insertion products. In this work, the loss of CH 2 O (Scheme 2) gives evidence for the occurrence of these processes.…”
Section: Ms-ms Analysismentioning
confidence: 99%
“…[27a, 45,46] Accordingly, both types of complexes are chosen as model systems for CID experiments, IRMPD spectra, and theoretical investigations.…”
mentioning
confidence: 99%