Hexamethyldisilan

Bezeichnung:Hexamethyldisilan

CAS-Nr1450-14-2

Englisch Name:Hexamethyldisilane

CBNumberCB4476113

SummenformelC6H18Si2

Molgewicht146.38

MOL-Datei1450-14-2.mol

Synonyma

Hexamethyldisilan

Hexamethyldisilan physikalisch-chemischer Eigenschaften

Schmelzpunkt	9-12 °C (lit.)
Siedepunkt	112-114 °C (lit.)
Dichte	0.715 g/mL at 25 °C (lit.)
Brechungsindex	n20/D 1.422(lit.)
Flammpunkt	29 °F
storage temp.	Store at <= 20°C.
Löslichkeit	sol common organic solvents; insol H2O.
Aggregatzustand	liquid
Wichte	0.729
Farbe	colorless
Wasserlöslichkeit	Insoluble in water. Soluble in alcohol, ether and acetone.
Hydrolytic Sensitivity	1: no significant reaction with aqueous systems
BRN	1633463
Stabilität	Volatile
InChIKey	NEXSMEBSBIABKL-UHFFFAOYSA-N
CAS Datenbank	1450-14-2(CAS DataBase Reference)
NIST chemische Informationen	Disilane, hexamethyl-(1450-14-2)
EPA chemische Informationen	Disilane, hexamethyl- (1450-14-2)

Sicherheit

Kennzeichnung gefährlicher	F,Xi
R-Sätze:	11-36/37-43-36/37/38
S-Sätze:	16-23-45-9-33-26-7/9
RIDADR	UN 1993 3/PG 2
WGK Germany	2
RTECS-Nr.	JM9170000
TSCA	Yes
HazardClass	3
PackingGroup	II
HS Code	29310095
Toxizität	LD50 orally in Rabbit: 2160 mg/kg LD50 dermal Rabbit 2160 mg/kg

Gefahreninformationscode (GHS)

Hexamethyldisilane Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R11:Leichtentzündlich.
R36/37:Reizt die Augen und die Atmungsorgane.
R43:Sensibilisierung durch Hautkontakt möglich.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S16:Von Zündquellen fernhalten - Nicht rauchen.
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S9:Behälter an einem gut gelüfteten Ort aufbewahren.
S33:Maßnahmen gegen elektrostatische Aufladungen treffen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S7/9:Behälter dicht geschlossen an einem gut gelüfteten Ort aufbewahren.
Chemische Eigenschaften
Colorless clear liquid
Verwenden
Hexamethyldisilane acts as a silylating reagent for allylic acetates, aryl halides and diketones. It is a source material for vapor deposition during silicon carbide growth. It is also used in electronic and semiconducter industries.
Application
Hexamethyldisilane is an important silane protective agent, which can synthesize sodium trimethylsilane, potassium trimethylsilane and lithium trimethylsilane.
Preparation of iodotrimethylsilane.
Used as trimethylsilane anion reagent.
silylating or reducing reagent in combination with a Pd catalyst or a nucleophile.
Replaces aromatic nitriles with TMS groups in presence of [RhCl(cod)]2.
Precursor for CVD of silicon carbide.
Brings about the homocoupling of arenesulfonyl chlorides in the presence of Pd2(dba)3.
Used as a solvent for the direct borylation of fluoroaromatics.
Reacts with alkynes to form siloles.
Undergoes the silylation of acid chlorides to give acylsilanes.
synthetische
Hexamethyldisilane is produced by the reaction of methyl Grignard reagent with methylchlorodisilanes. This reaction is normally conducted in the presence of an ether such as diethyl ether, ethyl propyl ether, THF and the like.
Brandgefahr
Hexamethyldisilazane (HMDZ) is a highly flammable liquid and vapour.
HMDZ liquid is lighter than water and may float on water, spreading material during fire fighting. Leaking material or fire runoff to sewer may create fire or explosion hazard.
HMDZ vapours are heavier than air and can accumulate to form explosive concentrations. The vapours may also spread a considerable distance to a source of ignition, and flash back towards the source.
HMDZ reacts with water to form ammonia.
HMDZ is a non-conductor and, therefore, can accumulate static electrical charges when processed, handled or dispensed. HMDZ's flash point is 52 to 53°F, closed cup, for "pure" material.
läuterung methode
The most likely impurity is trimethylchlorosilane (cf boiling point). Wash it with H2O, cold conc H2SO4, H2O again, then aqueous NaHCO3, dry over CaSO4 and fractionate at atmospheric pressure. [Brown & Fowles J Chem Soc 2811 1958.] A grossly impure sample (25% impurities) was purified by repeated spinning band distillation. This lowered the impurity level to 500ppm. The main impurity was identified as 1-hydroxypentamethyldisilane. [Beilstein 4 IV 4277.]

Hexamethyldisilane Upstream-Materialien And Downstream Produkte

Hexamethyldisilan Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

1450-14-2, Hexamethyldisilane Verwandte Suche:

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