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Tris(trimethylsilyl)phosphine is prepared by treating trimethylsilyl chloride, white phosphorus, and sodium-potassium alloy: [2] 1/4 P 4 + 3 Me 3 SiCl + 3 K → P(SiMe 3) 3 + 3 KCl. Several other methods exist. [1] Copper phosphide cluster Cu 96 P 30 {P(SiMe 3) 2} 6 (PEt 3) 18 with C and H atoms omitted for clarity (red=Cu, purple=P, tan=Si ...
PCl 3 + 3 EtOH + 3 R 3 N → P(OEt) 3 + 3 R 3 NH + 3 Cl − Many analogues of diethyl phosphite can be prepared. [ 4 ] [ 5 ] Despite being named as a phosphite the compound exists overwhelmingly in its phosphonate form, (C 2 H 5 O) 2 P(O)H , a property it shares with its parent acid phosphorous acid .
Triethyl phosphonoacetate is a reagent for organic synthesis used in the Horner-Wadsworth-Emmons reaction (HWE) or the Horner-Emmons modification.. Triethyl phosphonoacetate can be added dropwise to sodium methoxide solution to prepare a phosphonate anion.
It reacts with a catalytic amount of methyl iodide in the Arbuzov reaction to give dimethyl methylphosphonate: P(OCH 3) 3 → CH 3 P(O)(OCH 3) 2. As a ligand, trimethyl phosphite has a smaller cone angle and better acceptor properties relative to trimethylphosphine. A representative derivative is the colorless tetrahedral complex Ni(P(OMe) 3) 4 ...
As a result, the lone pair of trimethylphosphine has predominantly s-character as is the case for phosphine, PH 3. [3] PMe 3 can be prepared by the treatment of triphenyl phosphite with methylmagnesium chloride: [4] 3 CH 3 MgCl + P(OC 6 H 5) 3 → P(CH 3) 3 + 3 C 6 H 5 OMgCl. The synthesis is conducted in dibutyl ether, from which the more ...
Chemists sometimes use a trimethylsilylating reagent to derivatize rather non-volatile compounds such as certain alcohols, phenols, or carboxylic acids by substituting a trimethylsilyl group for a hydrogen in the hydroxyl groups on the compounds. This way trimethylsiloxy groups [−O-Si(CH 3) 3] are formed on the molecule.
The Michaelis–Arbuzov reaction is initiated with the S N 2 attack of the nucleophilic phosphorus species (1 - A phosphite) with the electrophilic alkyl halide (2) to give a phosphonium salt as an intermediate (3). These intermediates are occasionally stable enough to be isolated, such as for triaryl phosphites which do not react to form the ...
Dimethyl methylphosphonate can be prepared from trimethyl phosphite and a halomethane (e.g. iodomethane) via the Michaelis–Arbuzov reaction. [2]Dimethyl methylphosphonate is a schedule 2 chemical as it may be used in the production of chemical weapons.
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