NDLI: Electrospray Ionization Mass Spectrometry of Palladium(II) Quinolinylaminophosphonate Complexes

Content Provider	Springer Nature Link
Author	Juribašić, Marina Bellotto, Lisa Traldi, Pietro Tušek Božić, Ljerka
Copyright Year	2011
Abstract	The mass spectrometric behavior of palladium(II) halide complexes of three types of quinolinylaminophosphonates, diethyl and dibutyl esters of [α-anilino-(quinolin-2-yl)methyl]phosphonic (L1, L2), [α-anilino-(quinolin-3-yl)methyl]phosphonic (L3, L4), and [α-(quinolin-3-ylamino)-N-benzyl]phosphonic acid (L5, L6), was investigated under positive ion electrospray ionization conditions. Each type of ligand forms complexes with different metal–ligand interactions. Mononuclear dihalide adducts cis-[Pd(L1/L2)X$_{2}$] (1–4) and trans-[Pd(L3/L4)$_{2}$X$_{2}$] (5–8) as well as dinuclear tetrahalide complexes [Pd$_{2}$(L5/L6)$_{3}$X$_{4}$] (9–12) (X = Cl, Br) are formed by metal bonding either through the quinoline or both the quinoline and amino nitrogen atoms. The sodiated molecule [M + Na]$^{+}$ is observed in the mass spectra of all the complexes, and its abundance as well as the fragmentation pathway depend on the type of the complex. In the cis complexes (1–4) the initial decomposition goes under two fragmentation routes: those in which the sodium molecular adduct sequentially loses halides HX/NaX and those in which this loss is in the competition with the loss of dialkyl phosphite. The predominant pathways for decomposition of trans dihalide (5–8) and tetrahalide (9–12) complexes include three competitive reactions; the loss of halides, dialkyl phosphites and the intact phosphonate ligand molecule and its fragments formed by ester dissociation or complete loss of the phosphonate ester moiety. A series of acetonitrile adducts and cluster ions derived from dimolecular clusters [2M + Na]$^{+}$ were also detected. The most important fragmentation patterns are rationalized and supported by the MS$^{ n }$ studies.
Starting Page	1815
Ending Page	1825
Page Count	11
File Format	PDF
ISSN	10440305
Journal	Journal of The American Society for Mass Spectrometry
Volume Number	22
Issue Number	10
e-ISSN	18791123
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-07-12
Publisher Institution	The American Society for Mass Spectrometry
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mass spectrometry Electrospray ionization Tandem mass spectrometry Quinolinylaminophosphonate Palladium(II) complex Organic Chemistry Biotechnology Bioinformatics Proteomics Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Structural Biology

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