Synthesis of allyl- and aryl-iminopyrrolyl complexes of nickel

R M Bellabarba, P T Gomes, Sofia I Pascu

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Abstract

The 2-iminopyrrole ligand precursors 2-C4H3NH[(R)C=N(2,4,6-C6H2Me3)] (R=H, I; R=Me, II) were synthesised and react with NaH to give the corresponding sodium salts 1 and 2, respectively. Salt 2 reacts with [NiPhBr(PPh3)(2)] to yield [NiPh(acetiminopyrrolyl)(PPh3)](3). Ligand precursors II and 2 react, respectively, with equimolar amounts of [NiMe2(TMEDA)] and [NiBr2(NCMe)(2)] to give [Ni(acetiminopyrrolyl)(2)] 4. Both 1 and 2 react with [Ni(eta(3)-C3H5)(mu-Br)](2) to give complexes [Ni(eta(3)-C3H5)(iminopyrrolyl)] 5 and 6. The crystal structures of ligand precursor II and of complex 3 are reported and compared. Complex 3 was tested for catalytic activity for the oligomerisation of ethylene and showed only moderate activity.
Original languageEnglish
Pages (from-to)4431-4436
Number of pages6
JournalDalton Transactions
Volume2003
Issue number23
DOIs
Publication statusPublished - 2003

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Nickel
Ligands
Salts
Oligomerization
Catalyst activity
Crystal structure
Sodium

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Synthesis of allyl- and aryl-iminopyrrolyl complexes of nickel. / Bellabarba, R M; Gomes, P T; Pascu, Sofia I.

In: Dalton Transactions, Vol. 2003, No. 23, 2003, p. 4431-4436.

Research output: Contribution to journalArticle

Bellabarba, R M ; Gomes, P T ; Pascu, Sofia I. / Synthesis of allyl- and aryl-iminopyrrolyl complexes of nickel. In: Dalton Transactions. 2003 ; Vol. 2003, No. 23. pp. 4431-4436.
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abstract = "The 2-iminopyrrole ligand precursors 2-C4H3NH[(R)C=N(2,4,6-C6H2Me3)] (R=H, I; R=Me, II) were synthesised and react with NaH to give the corresponding sodium salts 1 and 2, respectively. Salt 2 reacts with [NiPhBr(PPh3)(2)] to yield [NiPh(acetiminopyrrolyl)(PPh3)](3). Ligand precursors II and 2 react, respectively, with equimolar amounts of [NiMe2(TMEDA)] and [NiBr2(NCMe)(2)] to give [Ni(acetiminopyrrolyl)(2)] 4. Both 1 and 2 react with [Ni(eta(3)-C3H5)(mu-Br)](2) to give complexes [Ni(eta(3)-C3H5)(iminopyrrolyl)] 5 and 6. The crystal structures of ligand precursor II and of complex 3 are reported and compared. Complex 3 was tested for catalytic activity for the oligomerisation of ethylene and showed only moderate activity.",
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N2 - The 2-iminopyrrole ligand precursors 2-C4H3NH[(R)C=N(2,4,6-C6H2Me3)] (R=H, I; R=Me, II) were synthesised and react with NaH to give the corresponding sodium salts 1 and 2, respectively. Salt 2 reacts with [NiPhBr(PPh3)(2)] to yield [NiPh(acetiminopyrrolyl)(PPh3)](3). Ligand precursors II and 2 react, respectively, with equimolar amounts of [NiMe2(TMEDA)] and [NiBr2(NCMe)(2)] to give [Ni(acetiminopyrrolyl)(2)] 4. Both 1 and 2 react with [Ni(eta(3)-C3H5)(mu-Br)](2) to give complexes [Ni(eta(3)-C3H5)(iminopyrrolyl)] 5 and 6. The crystal structures of ligand precursor II and of complex 3 are reported and compared. Complex 3 was tested for catalytic activity for the oligomerisation of ethylene and showed only moderate activity.

AB - The 2-iminopyrrole ligand precursors 2-C4H3NH[(R)C=N(2,4,6-C6H2Me3)] (R=H, I; R=Me, II) were synthesised and react with NaH to give the corresponding sodium salts 1 and 2, respectively. Salt 2 reacts with [NiPhBr(PPh3)(2)] to yield [NiPh(acetiminopyrrolyl)(PPh3)](3). Ligand precursors II and 2 react, respectively, with equimolar amounts of [NiMe2(TMEDA)] and [NiBr2(NCMe)(2)] to give [Ni(acetiminopyrrolyl)(2)] 4. Both 1 and 2 react with [Ni(eta(3)-C3H5)(mu-Br)](2) to give complexes [Ni(eta(3)-C3H5)(iminopyrrolyl)] 5 and 6. The crystal structures of ligand precursor II and of complex 3 are reported and compared. Complex 3 was tested for catalytic activity for the oligomerisation of ethylene and showed only moderate activity.

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