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Reaction of alkyl, alkenyl alkynyl and carbene ligands

1 Reaction of alkyl, alkenyl alkynyl and carbene ligands [Pg.462]

Halogenolysis of alkyl complexes of d or d metals, e.g. Zr(IV) or Hg(II), did not involve the initial oxidation of the metal atom but proceeded via the direct, front-side attack at the M-C bond (S 2) with retention of configuration [128]. [Pg.462]

Protonolysis of electron-rich alkylmetals may proceed via initial electrophilic attack at metal, i.e. hydride complex formation. Different from the case of the halogenolysis, the subsequent C-H bond formation occurred via internal reductive elimination with overall retention of configuration (Eq. 8.24) [129]. [Pg.463]

The formation of methane from methyl complexes of Pt(ll) and H+ received considerable attention as the reverse step of methane activation by Pt(ll) salts [130]. This protonolysis similarly proceeded via methyl(hydride)platinum(lV) intermediate, the existence of which has actually been confirmed spectrally [131]. Stereochemistry at the a-carbon during SO2 insertion into alkyl-metal bond is diverse, both retention and inversion of configuration having been observed [29,128,132]. [Pg.463]

Tebbe s reagent (j7 -C5H5)2Ti(/x-CH2)(/x-Cl)AlMe2 similarly reacted with carbonyl compounds. [Pg.465]




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Alkenyl carbenes

Alkenyl carbenes reactions

Alkenyl ligands

Alkenylation and Alkynylation

Alkyl ligand 7-Alkyls

Alkyl ligands

Alkynyl alkylation

Alkynyl ligands

And carbenes

Carbene reactions

Carbenes alkyl

Carbenes ligands

Carbenes reactions

Of alkylation reactions

Of carbenes

Reactions alkynylation

Reactions of carbenes

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