Tetrabutylsilane

Structural formula
General
Surname	Tetrabutylsilane
other names	Tetra- n -butylsilan Tetrabutyl silicon
Molecular formula	C 16 H 36 Si
External identifiers / databases
CAS number 994-79-6 EC number 213-621-9 ECHA InfoCard 100.012.383 PubChem 70443 Wikidata Q20054550
properties
Molar mass	256.54 g mol −1
Physical state	liquid
density	0.799 g cm −3
Melting point	−56  ° C
boiling point	230 ° C
Refractive index	1.4465 (20 ° C)
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 315-319-335 P: 261-280-305 + 351 + 338-304 + 340-405-501
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Tetrabutylsilane is a chemical compound from the group of organosilicon compounds .

Extraction and presentation

Tetrabutylsilane can be produced by reacting silicon tetrachloride with butyllithium in diethyl ether :

${\displaystyle {\ce {SiCl4{}+4LiC4H9->[\mathrm {Et_{2}O} ][]Si(C4H9)4{}+4LiCl}}}$

properties

Physical Properties

Tetrabutylsilane is a clear, colorless liquid with a slight odor, a refractive index of 1.4465 and a flash point of 119.1 ° C.

Chemical properties

Like the analogous compounds of lead and germanium, tetrabutylsilane also reacts with elemental sulfur when heated . In contrast to these, however, the corresponding metal sulfide is not formed, but rather hexabutyl disilthiane at 240 ° C

${\displaystyle {\ce {2 Si(C4H9)4 + 2 S -> S((C4H9)3)2 + 2 S(Si(C4H9)3)2}}}$

Individual evidence

1. ↑ ^{a b c} Entry on tetrabutylsilane at ChemicalBook , accessed on March 28, 2015.
2. ↑ ^{a b c d} Safety Data Sheet: Tetra-n-butylsilane. (PDF) Fluorochem, accessed on April 5, 2015 .  
3. ^ Stephan Pawlenko: Organosilicon Chemistry. Walter de Gruyter, 1986, ISBN 978-3-11-086238-6 , p. 18 ( limited preview in Google book search).
4. ^ Max Schmidt, Herbert Schumann: Cleavage reactions of organometallic compounds with chalcogens. Reactions of sulfur with organosilicon, germanium and lead organic compounds . In: Journal of Inorganic and General Chemistry . tape 325 , no. 3-4 , October 1963, pp. 130 , doi : 10.1002 / zaac.19633250305 .