Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
The effects of coordination number and ligand size on the gas phase dissociation and stereochemical differentiation of cobalt-coordinated monosaccharides
Autore:
Desaire, H; Leary, JA;
Indirizzi:
Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 ll Chem, Berkeley, CA 94720 USA
Titolo Testata:
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
fascicolo: 2-3, volume: 209, anno: 2001,
pagine: 171 - 184
SICI:
1387-3806(20010925)209:2-3<171:TEOCNA>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
TANDEM MASS-SPECTROMETRY; STEREOSELECTIVE ENOLBORATION; ION-TRAP; DICYCLOHEXYLCHLOROBORANE TRIETHYLAMINE; MULTICOMPONENT QUANTIFICATION; REPRESENTATIVE KETONES; SELECTIVE GENERATION; CONVENIENT REAGENT; GLYCOSIDIC BOND; COMPLEXES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Leary, JA Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 erkeley, CA 94720 USA
Citazione:
H. Desaire e J.A. Leary, "The effects of coordination number and ligand size on the gas phase dissociation and stereochemical differentiation of cobalt-coordinated monosaccharides", INT J MASS, 209(2-3), 2001, pp. 171-184

Abstract

Previously we have shown that stereoisomeric hexosamines and N-acetylhexosamines can be uniquely identified by mass spectrometry when they are derivatized with [Co(DAP)(2)Cl-2]Cl and subjected to ES-MSn studies. Here, we explore why the diastereomers dissociate differently by investigating the roleof the auxiliary ligand. Complexes which have two, three, and four auxiliary nitrogens coordinated to the Co, center are investigated. By comparing these complexes, we demonstrate that the ligand affects the dissociations bycontributing to both the sterics and the electronics about the metal center. Finally, we use this information to gain new insight about a key dissociation mechanism, loss of formaldehyde, which occurs stereoselectively for the [Co(DAP)(GalNAc-2H)](+) complex. (C) 2001 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 10:06:49