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Transition metal complexes tetrasubstituted

Palladium(II) salts, in the form of organic solvent soluble complexes such as PdCl2(RCN)2, Pd(OAc>2 or Li2PdCU, are by far the most extensively utilized transition metal complexes to activate simple (unactivated) alkenes towards nucleophilic attack (Scheme 1). Alkenes rapidly and reversibly complex to pal-ladium(II) species in solution, readily generating alkenepalladium(II) species (1) in situ. Terminal monoalkenes are most strongly complexed, followed by internal cis and trans (respectively) alkenes. Geminally disubstituted, trisubstituted and tetrasubstituted alkenes are only weakly bound, if at all, and intermolecular nucleophilic additions to these alkenes are rare. [Pg.551]

A variety of transition metal complexes, especially those of cobalt and copper, catalyze the oxidation of phenols. Autoxidations of 2,6-disubstituted phenols in organic solvents produce mainly the 2,6-disubstituted-1,4-benzoquinone and the 3,5,3, 5 -tetrasubstituted-4,4 -diphenoquinone with Co catalysts and certain copper catalysts (eq. Poly(2,6-... [Pg.164]

See other pages where Transition metal complexes tetrasubstituted is mentioned: [Pg.334]    [Pg.289]    [Pg.251]    [Pg.188]    [Pg.282]    [Pg.500]    [Pg.464]    [Pg.489]    [Pg.188]    [Pg.1025]    [Pg.138]    [Pg.230]    [Pg.1938]    [Pg.440]    [Pg.3]   
See also in sourсe #XX -- [ Pg.11 , Pg.115 ]



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2.2.3.3- Tetrasubstituted

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