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STRUCTURAL ANALYSIS OF 2,6-[BIS(ALKYLOXY)METHYL]PHENYLTIN DERIVATIVES USING ELECTROSPRAY IONIZATION MASS SPECTROMETRY

Rok: 2004

Druh publikace: ostatní - přednáška nebo poster

Název zdroje: Sborník str. 186

Název nakladatele: University of B.C.

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Jazyk	Název	Abstrakt	Klíčová slova
cze	STRUCTURAL ANALYSIS OF 2,6-[BIS(ALKYLOXY)METHYL]PHENYLTIN DERIVATIVES USING ELECTROSPRAY IONIZATION MASS SPECTROMETRY	Electrospray ionization (ESI) mass spectrometry has been applied for the structural analysis of twenty-three 2,6-[bis(alkyloxy)methyl]phenyltin(IV) derivatives. The mass spectra were measured in both polarity modes and multistage tandem mass spectrometric measurements (MSn) were performed on the ion trap analyzer for positively charged tin-containing ions. The sum of complementary ions observed in the positive-ion mode (i.e. [M-R3]+ ion) and in the negative-ion mode (i.e. [R3]- ion) enables the molecular mass determination in spite of the fact that the molecular adducts were often missing even in the first-order mass spectra. The subsequent fragmentation of [M-R3]+ ion studied by MSn and the correlation of observed fragment ions with expected structures of synthetised organotin(IV) compounds allowed us to understand the fragmentation behaviour and the mechanism of the ion formation for studied compounds. The fragmentation pattern of one selected compound was supported by MSn measurements of isotopically labelled analogue to confirm unusual ion-molecule reaction of some fragment ions with water in the ion trap.
eng	STRUCTURAL ANALYSIS OF 2,6-[BIS(ALKYLOXY)METHYL]PHENYLTIN DERIVATIVES USING ELECTROSPRAY IONIZATION MASS SPECTROMETRY	Electrospray ionization (ESI) mass spectrometry has been applied for the structural analysis of twenty-three 2,6-[bis(alkyloxy)methyl]phenyltin(IV) derivatives. The mass spectra were measured in both polarity modes and multistage tandem mass spectrometric measurements (MSn) were performed on the ion trap analyzer for positively charged tin-containing ions. The sum of complementary ions observed in the positive-ion mode (i.e. [M-R3]+ ion) and in the negative-ion mode (i.e. [R3]- ion) enables the molecular mass determination in spite of the fact that the molecular adducts were often missing even in the first-order mass spectra. The subsequent fragmentation of [M-R3]+ ion studied by MSn and the correlation of observed fragment ions with expected structures of synthetised organotin(IV) compounds allowed us to understand the fragmentation behaviour and the mechanism of the ion formation for studied compounds. The fragmentation pattern of one selected compound was supported by MSn measurements of isotopically labelled analogue to confirm unusual ion-molecule reaction of some fragment ions with water in the ion trap.

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