- Bis(trimethylsilyl)acetylene
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- $3.00 / 25KG
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2026-04-17
- CAS:14630-40-1
- Min. Order: 0.1KG
- Purity: 99%
- Supply Ability: g-kg-tons, free sample is available
- Bis(trimethylsilyl)acetylene
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- $15.00 / 1KG
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2021-07-13
- CAS:14630-40-1
- Min. Order: 1KG
- Purity: 99%+ HPLC
- Supply Ability: Monthly supply of 1 ton
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| | Bis(trimethylsilyl)acetylene Basic information |
| | Bis(trimethylsilyl)acetylene Chemical Properties |
| Hazard Codes | F,Xi | | Risk Statements | 11-36/37/38-10 | | Safety Statements | 16-26-36 | | RIDADR | UN 1993 3/PG 2 | | WGK Germany | 3 | | F | 10 | | TSCA | TSCA listed | | HazardClass | 3 | | PackingGroup | III | | HS Code | 29310095 | | Storage Class | 3 - Flammable liquids | | Hazard Classifications | Eye Irrit. 2
Flam. Liq. 2
Skin Irrit. 2
STOT SE 3 |
| | Bis(trimethylsilyl)acetylene Usage And Synthesis |
| Chemical Properties | clear colorless liquid after melting | | Uses | In the presence of CpCo(CO)2 (cat. no. 245259), undergoes cycloaddition with 1,5-hexadiynes to form benzocyclobutenes.1 | | Uses | BTMSA is used as starting reagent in the synthesis of functionalized 4-R-1,2-bis(trimethylsilyl)benzenes. It is also used in the synthesis of (+)-brasilenyne2 and (β-diketanato)Ag(BTMSA). Bis(trimethylsilyl)acetylene is a ligand that binds to a central metal ion (e.g. Titanium) to create a coordination complex. One of its complexes, Permethyltitanocene-bis(trimethylsilyl)acetylene, is a catalyst for the head-to-tail dimerization of 1-alkynes (e.g. 3-Penten-1-yne [P227430]). | | General Description | Bis(trimethylsilyl)acetylene (BTMSA) participates as nucleophile in Friedel-Crafts type acylations and alkylations. BTMSA undergoes rhodium catalyzed addition reaction with diarylacetylenes. It undergoes cycloaddition with 1,5-hexadiynes in the presence of CpCo(CO)2 (Cp=cyclopentadienyl) to form benzocyclobutenes. Structure of BTMSA was characterized by a centre of inversion present on triple bond (length=1.208(3)). TiCl4-Et2AlCl catalyzed Diels-Alder reaction of BTMSA with norbornadiene has been reported. | | Synthesis | Di(trimethylmethylsilyl)acetylene can be synthesized by the following steps: 1 With acetylene dimetallic salt and trimethyl halosilane as raw materials, acetylene dimetallic salt and trimethyl halosilane molar mass ratio of 1:2.0~1:2.2, first suspended in toluene, dropwise addition of trimethyl halosilane, dropwise addition, warming up to 50~60 C reaction for 2 hours, in which the acetylene Dimetallic salt is disodium acetylene or dilithium acetylene;
2 Terminate the reaction with water, after extraction, drying, concentration under reduced pressure, distillation under reduced pressure, to obtain bis(trimethylsilyl)acetylene with purity of more than 99% and yield of more than 90%. | | Purification Methods | Dissolve it in pet ether and wash it with ice-cold dilute HCl. The pet ether extract is dried (MgSO4), evaporated and fractionated at 760mm. [Walton & Waugh J Organomet Chem 37 45 1972, Beilstein 4 IV 3950.] |
| | Bis(trimethylsilyl)acetylene Preparation Products And Raw materials |
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