TPPTS

• TPPTS
• Tppts

White crystalline solid

Fixed

Soluble in water

Attention

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Tri - (sodium meta- sulfonatophenyl ) phosphine ( TPPTS abbreviated as isolated compound or as TPPTS as a ligand ) is an organic compound with the formula C18H12Na3O9PS3. It is a white crystalline solid and is an example of a water- soluble phosphine. The rhodium hydrido complexes of the compound is used as a homogeneous catalyst in the industrial production of butanal by using hydroformylation.

Synthesis

TPPTS is produced by the sulfonation of triphenylphosphine. The sulfonation is carried out in the meta position of the phenyl rings. For the sulfonation oleum used. The resulting sulfonic acid is then added Trioctylamine and sodium hydroxide. Immediately after the resolution in the reaction medium, the phosphine is protonated. The resulting phosphonium salt is sulfonated. The overall equation is:

As a Lewis base TPPTS is stronger than triphenylphosphine.

Used in the hydroformylation

Organometallic complexes of TPPTS are soluble in water and thus allow for heterogeneity in homogeneous catalysis. This is the basis for their industrial application. TPPTS -modified rhodium catalysts are used since 1984 in the phase hydroformylation of propene after the Ruhr Chemie / Rhône -Poulenc process. In the hydroformylation, also known as the oxo synthesis, an alkene reacts with carbon monoxide and hydrogen to an aldehyde. Traditionally, the hydroformylation was carried out with organometallic rhodium and cobalt complexes in non-aqueous solvents.