Presentation Title

Synthesis of Iron(III) and Copper(II) Pincer Complexes Bearing N-Heterocyclic Carbene Ligands Synthesized from Amino Acids

Start Date

November 2016

End Date

November 2016

Location

HUB 302-#8

Type of Presentation

Poster

Abstract

In this research, the synthesis of iron(III) and copper(II) pincer complexes bearing N-heterocyclic carbene (NHC) ligands were attempted. The imidazolium salts, NHC precursors, were synthesized according to a literature procedure using glycine and alanine, deprotonated with sodium hydroxide, and mixed with the metal chloride salt in water. This resulted in complexes 1 (Fe(III)NHC-glycine, brown solid), 2 (Fe(III)NHC-alanine, brown solid), 3 (Cu(II)NHC-glycine, blue-green solid), and 4 (Cu(II)NHC-alanine, blue-green solid) 5 (Ni(II)NHC-glycine, dark green solid) 6 (Ni(II)NHC-alanine, green solid) . Addition of imidazole to complexes 3 and 4 resulted in light purple solids, suggesting that a possible ligand displacement reaction occurred. IR data and observed color changes of reactant to isolated product supports the formation of the metal complexes. Future work will focus on further characterization of these complexes including structure determination using 1H NMR spectroscopy.

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Synthesis of Iron(III) and Copper(II) Pincer Complexes Bearing N-Heterocyclic Carbene Ligands Synthesized from Amino Acids

HUB 302-#8

In this research, the synthesis of iron(III) and copper(II) pincer complexes bearing N-heterocyclic carbene (NHC) ligands were attempted. The imidazolium salts, NHC precursors, were synthesized according to a literature procedure using glycine and alanine, deprotonated with sodium hydroxide, and mixed with the metal chloride salt in water. This resulted in complexes 1 (Fe(III)NHC-glycine, brown solid), 2 (Fe(III)NHC-alanine, brown solid), 3 (Cu(II)NHC-glycine, blue-green solid), and 4 (Cu(II)NHC-alanine, blue-green solid) 5 (Ni(II)NHC-glycine, dark green solid) 6 (Ni(II)NHC-alanine, green solid) . Addition of imidazole to complexes 3 and 4 resulted in light purple solids, suggesting that a possible ligand displacement reaction occurred. IR data and observed color changes of reactant to isolated product supports the formation of the metal complexes. Future work will focus on further characterization of these complexes including structure determination using 1H NMR spectroscopy.