The marked influence of steric and electronic properties of ancillary pyridylthioether ligands on the rate of allene insertion into the palladium-carbon bond was written by Canovese, Luciano;Visentin, Fabiano;Chessa, Gavino;Santo, Claudio;Uguagliati, Paolo;Bandoli, Giuliano. And the article was included in Journal of Organometallic Chemistry in 2002.Application In Synthesis of Sodium 2-methyl-2-propanethiolate This article mentions the following:
Neutral Me chloro complexes (L)Pd(Me)Cl 1 containing 6-R’-2-R-thiomethylpyridine ancillary ligands L (R’N-SR, R’ = H, Me, Cl; R = Me, Et, CHMe2, CMe3, Ph) were obtained by reaction of L with (COD)Pd(Me)Cl. Complexes 1 were carbonylated with CO to give corresponding acetyl derivatives 2. Kinetics of insertion of 1,1-dimethylpropadiene and 1,1,3,3-tetramethylpropadiene into the palladium-carbon bond in 1 and 2 was studied by 1H-NMR and UV-vis techniques. The rate of reaction is strongly dependent on the steric and electronic properties of the ancillary ligand and of the allene. The distortion induced by R’ on the main coordination plane of the complex (allowed by sulfur sp3 hybridization) activates the complex to nucleophilic attack by the allene. Increase of electrophilicity of the palladium core, caused by lowering of the basicity of L results in further enhancement of the rate of allene insertion. The rate constants for complexes with L = 6-chloro-2-phenylthiomethylpyridine (ClN-SPh) are the greatest observed so far for similar reactions. The associative asynchronous mechanism of the insertion reaction is discussed. In the experiment, the researchers used many compounds, for example, Sodium 2-methyl-2-propanethiolate (cas: 29364-29-2Application In Synthesis of Sodium 2-methyl-2-propanethiolate).
Sodium 2-methyl-2-propanethiolate (cas: 29364-29-2) belongs to alcohols. Similar to water, an alcohol can be pictured as having an sp3 hybridized tetrahedral oxygen atom with nonbonding pairs of electrons occupying two of the four sp3 hybrid orbitals. Tertiary alcohols cannot be oxidized at all without breaking carbon-carbon bonds, whereas primary alcohols can be oxidized to aldehydes or further oxidized to carboxylic acids.Application In Synthesis of Sodium 2-methyl-2-propanethiolate
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts