About: Siloxide

An Entity of Type: chemical compound, from Named Graph: http://dbpedia.org, within Data Space: dbpedia.org

Siloxides are chemical compounds with the formula R3SiOM, where R is usually an organic group and M is usually a metal cation. Also called silanoates, they are derived by deprotonation of silanols. They also arise by the degradation of siloxanes by base: R3SiOSiR3 + 2 NaOH → 2 R3SiONa + H2O Cleavage of cyclic siloxanes affords siloxides: (Me2SiO)3 + MeLi → Me3SiOSiMe2OSiMe2OLi Siloxides are weaker net donors than alkoxides because pπ-d donation has to compete with backbonding from the oxygen atom into the low-lying Si-C σ* orbitals.

Property Value
dbo:abstract
  • Siloxiodak R3SiOM formulako konposatu organosilizikoak dira. Normalean R talde organiko bat izaten da eta M metal baten katioia. Batzuetan silanoato ere esaten zaie. Bi prozesu desberdinen bidez eratzen dira. - Siloxanoetatik: R3SiOSiR3 + 2 NaOH → 2 R3SiONa + H2O- Silanoletatik: R3SiOH + NaOH → R3SiONa + H2O (eu)
  • Siloxides are chemical compounds with the formula R3SiOM, where R is usually an organic group and M is usually a metal cation. Also called silanoates, they are derived by deprotonation of silanols. They also arise by the degradation of siloxanes by base: R3SiOSiR3 + 2 NaOH → 2 R3SiONa + H2O Cleavage of cyclic siloxanes affords siloxides: (Me2SiO)3 + MeLi → Me3SiOSiMe2OSiMe2OLi These anions function as ligands for metal ions, forming complexes similar to metal alkoxides. Sodium trimethylsiloxide is useful for generating metal complexes by salt metathesis reactions. A very bulky siloxide is tert-butyl3SiO−, sometimes called silox. Siloxides are weaker net donors than alkoxides because pπ-d donation has to compete with backbonding from the oxygen atom into the low-lying Si-C σ* orbitals. (en)
  • Un siloxyde est un composé chimique de formule générique R3SiOM, où R est généralement un groupe organique et M est un cation métallique. Également appelés silanoates, ces composés résultent de la déprotonation de silanols. On peut les obtenir en traitant des siloxanes avec une base forte : R3SiOSiR3 + 2 NaOH ⟶ 2 R3SiONa + H2O. Le clivage de siloxanes cycliques donne également des siloxydes : (Me2SiO)3 + MeLi ⟶ Me3SiOSiMe2OSiMe2OLi. Ces anions jouent le rôle de ligands pour les ions métalliques, formant des complexes semblables aux alcoolates. Le triphénylsiloxyde est un dérivé courant utile pour générer des complexes métalliques. Le (tert-butyl)3SiO− ((CH3)3C)3SiO−, également appelé (en), est un ligand volumineux qui peut avoir un intérêt en synthèse organique. (fr)
  • Силоксид (рос. силоксид, англ. siloxide, нім. ”Siloxyd”) – сорт кварцового скла. Застосовують переважно для виготовлення хімічного (лабораторного) посуду. Назва - від лат. sil(ex) - кремінь oxys - кислий. Формула: R3SiOM, де R як правило, органічна група, а M, як правило, метал катіон. Одержання: * при деградації :R3SiOSiR3 + 2 NaOH → 2 R3SiONa + H2O * при розщепленні циклічних силоксанів:(Me2SiO)3 + MeLi → Me3SiOSiMe2OSiMe2OSiMe2OLi (uk)
dbo:wikiPageID
  • 35988751 (xsd:integer)
dbo:wikiPageLength
  • 1539 (xsd:nonNegativeInteger)
dbo:wikiPageRevisionID
  • 1045518510 (xsd:integer)
dbo:wikiPageWikiLink
dbp:wikiPageUsesTemplate
dct:subject
gold:hypernym
rdf:type
rdfs:comment
  • Siloxiodak R3SiOM formulako konposatu organosilizikoak dira. Normalean R talde organiko bat izaten da eta M metal baten katioia. Batzuetan silanoato ere esaten zaie. Bi prozesu desberdinen bidez eratzen dira. - Siloxanoetatik: R3SiOSiR3 + 2 NaOH → 2 R3SiONa + H2O- Silanoletatik: R3SiOH + NaOH → R3SiONa + H2O (eu)
  • Силоксид (рос. силоксид, англ. siloxide, нім. ”Siloxyd”) – сорт кварцового скла. Застосовують переважно для виготовлення хімічного (лабораторного) посуду. Назва - від лат. sil(ex) - кремінь oxys - кислий. Формула: R3SiOM, де R як правило, органічна група, а M, як правило, метал катіон. Одержання: * при деградації :R3SiOSiR3 + 2 NaOH → 2 R3SiONa + H2O * при розщепленні циклічних силоксанів:(Me2SiO)3 + MeLi → Me3SiOSiMe2OSiMe2OSiMe2OLi (uk)
  • Siloxides are chemical compounds with the formula R3SiOM, where R is usually an organic group and M is usually a metal cation. Also called silanoates, they are derived by deprotonation of silanols. They also arise by the degradation of siloxanes by base: R3SiOSiR3 + 2 NaOH → 2 R3SiONa + H2O Cleavage of cyclic siloxanes affords siloxides: (Me2SiO)3 + MeLi → Me3SiOSiMe2OSiMe2OLi Siloxides are weaker net donors than alkoxides because pπ-d donation has to compete with backbonding from the oxygen atom into the low-lying Si-C σ* orbitals. (en)
  • Un siloxyde est un composé chimique de formule générique R3SiOM, où R est généralement un groupe organique et M est un cation métallique. Également appelés silanoates, ces composés résultent de la déprotonation de silanols. On peut les obtenir en traitant des siloxanes avec une base forte : R3SiOSiR3 + 2 NaOH ⟶ 2 R3SiONa + H2O. Le clivage de siloxanes cycliques donne également des siloxydes : (Me2SiO)3 + MeLi ⟶ Me3SiOSiMe2OSiMe2OLi. (fr)
rdfs:label
  • Siloxido (eu)
  • Siloxyde (fr)
  • Siloxide (en)
  • Силоксид (uk)
owl:sameAs
prov:wasDerivedFrom
foaf:isPrimaryTopicOf
is dbo:wikiPageRedirects of
is dbo:wikiPageWikiLink of
is foaf:primaryTopic of
Powered by OpenLink Virtuoso    This material is Open Knowledge     W3C Semantic Web Technology     This material is Open Knowledge    Valid XHTML + RDFa
This content was extracted from Wikipedia and is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License