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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.
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.
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 ...
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.
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 ...
PCl 3 + 3 EtOH + 3 R 3 N → P(OEt) 3 + 3 R 3 NH + 3 Cl − In the absence of the base, the reaction of ethanol and phosphorus trichloride affords diethylphosphite ((EtO) 2 P(O)H). Of the many related compounds can be prepared similarly, triisopropyl phosphite is an example (b.p. 43.5 °C/1.0 mm; CAS# 116-17-6).
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 ...