The Phosphonium, triphenyl[3-(trimethylsilyl)-2-propyn-1-yl]-, bromide (1:1), with the CAS registry number 42134-49-6, is also known as 3-Trimethylsilyl-2-propynl)triphenylphosphonium. It belongs to the product categories of Acetylenes; Ethynylsilanes; Functionalized Acetylenes; Phosphonium Compounds; Si (Classes of Silicon Compounds); Si-(C)4 Compounds; Silicon Compounds (for Synthesis); Synthetic Organic Chemistry; Wittig & Horner-Emmons Reaction; Wittig Reaction; C-C Bond Formation; Olefination; Wittig Reagents. This chemical's molecular formula is C₂₄H₂₆BrPSi and molecular weight is 453.43. Its systematic name is called triphenyl[3-(trimethylsilyl)prop-2-yn-1-yl]phosphonium bromide. This chemical is beige to brownish crystalline powder.

Preparation: this chemical can be prepared by triphenylphosphane and 3-(trimethylsilyl)propargyl bromide. This reaction will need reagent aq. HBr and solvent dioxane.

Uses of Phosphonium, triphenyl[3-(trimethylsilyl)-2-propyn-1-yl]-, bromide (1:1): it can be used to produce trans-6-phenyl-1-trimethylsilylhex-3-en-1-yne. This reaction will need reagent N-butyl-lithium and solvent tetrahydrofuran with reaction time of 0.75 hours. The yield is about 68%.

When you are using this chemical, please be cautious about it as the following:
This chemical may cause inflammation to the skin or other mucous membranes. It is irritating to eyes, respiratory system and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. Whenever you will contact it, please wear suitable protective clothing, gloves and eye/face protection.

You can still convert the following datas into molecular structure:
(1)SMILES: [Br-].C(#C[Si](C)(C)C)C[P+](c1ccccc1)(c2ccccc2)c3ccccc3
(2)InChI: InChI=1/C24H26PSi.BrH/c1-26(2,3)21-13-20-25(22-14-7-4-8-15-22,23-16-9-5-10-17-23)24-18-11-6-12-19-24;/h4-12,14-19H,20H2,1-3H3;1H/q+1;/p-1
(3)InChIKey: PBSHVEOONSKWJF-REWHXWOFAO