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Triphenylphosphoniumbromid is a complex organic compound with the chemical formula C22H26BrPSi. It is a phosphonium salt, characterized by the presence of a phosphonium cation (P+) and a bromide anion (Br-). The compound features a triphenylphosphonium group, which consists of three phenyl rings attached to a phosphorus atom, and a trans-3-(trimethylsilyl)-2-propenyl group, which is a vinyl group with a trimethylsilyl substituent. Triphenylphosphoniumbromid is often used as a reagent in organic synthesis, particularly in the formation of carbon-carbon bonds and as a source of the trans-3-(trimethylsilyl)-2-propenyl anion. Its stability and reactivity make it a valuable tool in the synthesis of various organic compounds.

84673-81-4

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84673-81-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 84673-81-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,6,7 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 84673-81:
(7*8)+(6*4)+(5*6)+(4*7)+(3*3)+(2*8)+(1*1)=164
164 % 10 = 4
So 84673-81-4 is a valid CAS Registry Number.

84673-81-4Relevant academic research and scientific papers

Silylalkenes and -dienes via (Silylalkylidene)phosphoranes

Birkofer, Leonard,Kittler, Juergen

, p. 3737 - 3746 (2007/10/02)

The reaction of the (silylalkylidene)phosphoranes 3 and 4 with the ketones 5 - 7 and 16 leads to the silylated olefins 8 - 10 and 17, 18.With fluorenone (11), 3 affords the spiro compound 14, via (silylpropylidene)fluorene 13, which is also obtained by dehydration of 9--9-fluorenol (12).With the ketones 5 - 7 and 11, triphenylphosphorane (20) yields the silylated dienes 21 - 24.From cyclohexane (22) and tetracyanoethene (25) the spiran 26 is formed by cycloaddition.

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