Phosphine oxide, ethynyldiphenyl- (CAS 6104-48-9) is an organophosphorus compound characterized by the presence of a phosphine oxide functional group attached to an ethynyl group and two phenyl rings. This compound typically exhibits a white to light yellow crystalline appearance and is known for its stability under ambient conditions. It is soluble in organic solvents such as acetone and dichloromethane but has limited solubility in water. The presence of the ethynyl group contributes to its reactivity, allowing it to participate in various chemical reactions, including nucleophilic additions and coupling reactions. Phosphine oxides are often utilized in organic synthesis and materials science due to their ability to act as ligands in coordination chemistry and their potential applications in the development of pharmaceuticals and agrochemicals. Safety precautions should be observed when handling this compound, as it may pose health risks if ingested or inhaled. Proper storage in a cool, dry place away from incompatible materials is recommended to maintain its stability.

Phosphine oxide, ethynyldiphenyl-

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Ethynyl(diphenyl)phosphine oxide is an amide that has been shown to be useful in coordination, catalysis, and organic chemistry. It is a conformational analog of the amide group. Ethynyl(diphenyl)phosphine oxide has been used as a hydrogen-bond donor in esterification reactions. This compound can be synthesized by reacting the corresponding boronic acid with ethynyl alcohol. The yields of this reaction are dependent on the temperature and have been found to range from 60% to 70%. The nmr spectra of this compound show two signals at δ 2.95 and δ 4.85 ppm, corresponding to two different conformers of ethynyl(diphenyl)phosphine oxide.

CAS 6104-48-9: Phosphine oxide, ethynyldiphenyl-

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