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Titolo:
CHEMICAL-IMPACT ON A SEEMINGLY INERT MATERIAL - AN ELECTRON-MICROSCOPIC CASE-STUDY OF TITANIUM ACTIVATED BY CHLOROSILANES
Autore:
FURSTNER A; TESCHE B;
Indirizzi:
MAX PLANCK INST KOHLENFORSCH,KAISER WILHELM PL 1 D-45470 MULHEIM GERMANY
Titolo Testata:
Chemistry of materials
fascicolo: 7, volume: 10, anno: 1998,
pagine: 1968 - 1973
SICI:
0897-4756(1998)10:7<1968:COASIM>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOW-VALENT TITANIUM; GRIGNARD-REAGENTS; COUPLING REACTIONS; MCMURRY REACTION; DIOXIDE ELECTRODES; MAGNESIUM SURFACES; SPECTROSCOPY; CHEMISTRY; INDOLES; POWDER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
76
Recensione:
Indirizzi per estratti:
Citazione:
A. Furstner e B. Tesche, "CHEMICAL-IMPACT ON A SEEMINGLY INERT MATERIAL - AN ELECTRON-MICROSCOPIC CASE-STUDY OF TITANIUM ACTIVATED BY CHLOROSILANES", Chemistry of materials, 10(7), 1998, pp. 1968-1973

Abstract

Commercial titanium powder, after pretreatment with chlorosilanes, can be used as an ''off-the-shelf'' McMurry reagent for various types ofcarbonyl coupling reactions. Electron microscopic studies (SEM, TEM, HRTEM, and electron diffraction) of the activated titanium now reveal the morphological basis for the observed reactivity, which stems from a partial degradation of the passivating oxide layer on the surface aswell as from a severe change of the inner structure of the particles. Therefore, altered surface and altered bulk properties cooperatively account for the chemical reactivity of titanium metal activated by purely chemical means. Si-29 NMR investigations fully support this view.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/04/20 alle ore 20:17:40