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Syntheses and Structures of Nickel(0) Complexes containing the Methyl Methacrylate Monomer as Ligand

DOI: 10.1039/DT9950002033

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 2033 - 2040 (1995)

Update date:2022-08-02

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Authors:

Jarvis, Adam P.Jarvis, Adam P.

Haddleton, David M.Haddleton, David M.

Segal, John A.Segal, John A.

McCamley, AndrewMcCamley, Andrew

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Article abstract of DOI:10.1039/DT9950002033

The reaction of 4-C8H12)2> with the industrially important monomer methyl methacrylate, CH2=C(Me)CO2Me, in the presence of 1 or 2 mol equivalents of tricyclohexylphosphine leads to the formation of 2-CH2=C(Me)CO2Me>2> 1 and 2-CH2=C(Me)CO2Me>2> 2, respectively.The crystal structures of 1 and 2 have been determined and reveal an η2-CC mode of co-ordination of the methyl methacrylate ligands, with the CO2Me groups pendant and outside the nickel co-ordination sphere.Complexes 1 and 2 represent the first structurally characterised methyl methacrylate complexes; 2 is formed as a mixture of meso and DL diastereomers in the ratio 2.34: 1.Solution NMR studies indicate that the diastereomers interconvert rapidly, via an intramolecular mechanism, which is proposed to proceed via an O-co-ordinated intermediate.Reaction of 1 with an excess of tert-butyl acrylate CH2=CHCO2(t-Bu) yields 2-CH2=CHCO2(t-Bu))2> 4, which may be prepared independently from 4-C8H12)2>,P(C6H11)3 and tert-butyl acrylate.

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Product name:[Ni(η(2)-methyl methacrylate)2(tricyclohexylphosphine)]

Cas No:167413-59-4

167413-59-4

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