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| | Chlorotribenzylsilane Basic information |
| Product Name: | Chlorotribenzylsilane | | Synonyms: | TRIBENZYL CHLOROSILANE;TRIBENZYLSILYL CHLORIDE;chlorotris(phenylmethyl)-silan;Tribenzylchlorosilane, Tribenzylsilyl chloride;Chlorotris(phenylmethyl)silane;tribenzylchlorosilicane;Tribenzylchlorosilane 97%;Benzene, 1,1',1''-[(chlorosilylidyne)tris(methylene)]tris- | | CAS: | 18740-59-5 | | MF: | C21H21ClSi | | MW: | 336.93 | | EINECS: | 242-549-0 | | Product Categories: | | | Mol File: | 18740-59-5.mol |  |
| | Chlorotribenzylsilane Chemical Properties |
| Melting point | 139-142 °C(lit.) | | Boiling point | 437.9±14.0 °C(Predicted) | | density | 1.096±0.06 g/cm3(Predicted) | | solubility | sparingly sol cold petroleum ether; moderately sol hot
petroleum ether; sol ether. | | EPA Substance Registry System | Silane, chlorotris(phenylmethyl)- (18740-59-5) |
| Hazard Codes | C | | Risk Statements | 34 | | Safety Statements | 26-36/37/39-45 | | RIDADR | UN 3261 8/PG 2 | | WGK Germany | 3 | | F | 10-21 | | TSCA | TSCA listed | | HazardClass | 8 | | PackingGroup | II |
| | Chlorotribenzylsilane Usage And Synthesis |
| Physical properties | mp 141–142 °C;1,2 a somewhat higher value
(143–145 °C) is cited in the Aldrich catalog. | | Uses | Tribenzylchlorosilane is widely used as reagent for alcohol protection. | | Preparation | It is prepared by reaction of benzylmagnesium
chloride with SiCl4 in ether; separation from mono- and
dibenzylated chlorosilane byproducts is then accomplished by
fractional distillation (boiling range 300–360 °C/100 mmHg).
Other preparations involve the chlorination of tribenzylsilane
using Cl2
or an acyl chloride. No yields are reported for any
of the above preparative procedures. | | Purification Methods | It is recrystallised three times from pet ether (in slender colourless needles, m 141o). It is sparingly soluble in pet ether but is soluble in Et2O. It does not fume in moist air but is decomposed by H2O to give tribenzyl silanol m 106o (from pet ether). [Robinson & Kipping J Chem Soc 93 439 1908, Jenkins & Post J Org Chem 15 556 1950, Beilstein 16 H 906, 16 IV 1498.] |
| | Chlorotribenzylsilane Preparation Products And Raw materials |
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