Dichlorbis(1,1-dimethylethyl)silan

Bezeichnung:Dichlorbis(1,1-dimethylethyl)silan

CAS-Nr18395-90-9

Englisch Name:DI-TERT-BUTYLDICHLOROSILANE

CBNumberCB5725195

SummenformelC8H18Cl2Si

Molgewicht213.22

MOL-Datei18395-90-9.mol

Synonyma

Dichlorbis(1,1-dimethylethyl)silan

Dichlorbis(1,1-dimethylethyl)silan physikalisch-chemischer Eigenschaften

Schmelzpunkt	−15 °C(lit.)
Siedepunkt	190 °C729 mm Hg(lit.)
Dichte	1.009 g/mL at 25 °C(lit.)
Brechungsindex	n20/D 1.457(lit.)
Flammpunkt	143 °F
storage temp.	2-8°C
Löslichkeit	sol most common organic solvents.
Aggregatzustand	liquid
Wichte	1.009
Farbe	Colorless to Light yellow
Hydrolytic Sensitivity	8: reacts rapidly with moisture, water, protic solvents
Sensitive	Moisture Sensitive
BRN	1739236
CAS Datenbank	18395-90-9(CAS DataBase Reference)
EPA chemische Informationen	Silane, dichlorobis(1,1-dimethylethyl)- (18395-90-9)

Sicherheit

Kennzeichnung gefährlicher	C
R-Sätze:	34-37
S-Sätze:	26-36/37/39-45
RIDADR	UN 2987 8/PG 2
WGK Germany	3
F	10-21
TSCA	No
HazardClass	8
PackingGroup	II
HS Code	29319090

Gefahreninformationscode (GHS)

DI-TERT-BUTYLDICHLOROSILANE Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R34:Verursacht Verätzungen.
R37:Reizt die Atmungsorgane.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
Physikalische Eigenschaften
mp ?15°C; bp 190°C/729 mmHg; d 1.009 g cm?3.
Verwenden
Reagent used for preparing siliranes and protecting diols.
Verwenden
The presence of the bulky t-butyl groups in di-t-butyldichlorosilane has been found to increase the Si–C bond lengths slightly and to widen the CSiC bond angles by 11.1? relative to dichlorodimethylsilane as determined by electron diffraction and molecular mechanics calculations.
The di-t-butylsilylene protecting group for diols was introduced by Trost and Caldwell and used in a total synthesis of deoxypillaromycinone.It is introduced by the reaction of di-tbutyldichlorosilane with a 1,2- or 1,3-diol in acetonitrile in the presence of triethylamine and 1-hydroxybenzotriazole (HOBt) at 45–90°C (eq 1). For a related, highly reactive reagent see di-t-butylsilyl Bis(trifluoromethanesulfonate).
synthetische
can be conveniently prepared by chlorination of di-t-butylsilane (CCl4/PdCl2 (cat), 85%)but various other methods of preparation have been reported.
läuterung methode
Purify it by fractional distillation. 20 1.01. It is a colourless liquid with a pleasant odour and does not fume in moist air, but does not titrate quantitatively with excess of dilute alkali. [Tyler et al. J Am Chem Soc 70 2877 1948.] Di -tert-butyl silyl bis(trifluoromethanesulfonate) [85272 -31 -7] M 440.5, b 73.5 -7 4 . 5o/0.35mm, d 4 Purify it by fractional distillation at high vacuum. 20 1.36 (see pK for triflic acid). It is a pale yellow liquid which should be stored under argon. It is less reactive than the diisopropyl analogue. The presence of the intermediate monochloro compound can be detected by 1H NMR, (CHCl3): tert-Bu2Si(OTf)2 [ 1.25s], but impurities have 1.12s for tert-Bu2Si(H)OTf and 1.19s for tert-Bu2HSi(Cl)OTf. [Deslongchamps Tetrahedron Lett 23 4871 1982, Deslongchamps Aldrichimica Acta 17 72 1984.] TOXIC.

DI-TERT-BUTYLDICHLOROSILANE Upstream-Materialien And Downstream Produkte

Dichlorbis(1,1-dimethylethyl)silan Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

18395-90-9, DI-TERT-BUTYLDICHLOROSILANE Verwandte Suche:

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