Diphenylphosphine

Diphenylphosphine

Colorless liquid

Liquid

1.07 g · cm -3 ( 20 ° C)

-14.5 ° C

280 ° C

2.7 hPa ( 110 ° C)

1,626

Risk

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Diphenylphosphine is a chemical compound from the group of phosphanes.

Production

Diphenylphosphine can be obtained by the hydrogenation of chlorodiphenylphosphane with lithium aluminum hydride.

The reaction of triphenylphosphine with elemental lithium diphenylphosphine supplies.

Properties

Diphenylphosphine is a colorless liquid that melts at -14.5 ° C and boils at 280 ° C. Diphenylphosphine reacts as a very weak acid with strong bases to diphenylphosphide anion, which is stabilized by resonance.

Use

The anion of diphenyl phosphine ( Ph2P ) can be obtained by reaction with alkaline salts, for example potassium or lithium. The anion can be used as the nucleophile in the substitution reactions. This is, for example, for the synthesis of phosphorus ligands such as dppm or dppp used.