N, N', N'' versus N, N', O imine-containing coordination motifs: ligand-directed synthesis of mononuclear and binuclear CuII compounds

Raphael Enoque Ferraz de Paiva; Douglas Hideki Nakahata; Marcos Alberto de Carvalho; Fernando Rodrigues Goulart Bergamini; Pedro Paulo Corbi

doi:10.1107/S2056989017013652

N, N', N'' versus N, N', O imine-containing coordination motifs: ligand-directed synthesis of mononuclear and binuclear Cu^II compounds

Acta Crystallogr E Crystallogr Commun. 2017 Sep 29;73(Pt 10):1563-1567. doi: 10.1107/S2056989017013652. eCollection 2017 Oct 1.

Authors

Raphael Enoque Ferraz de Paiva¹, Douglas Hideki Nakahata¹, Marcos Alberto de Carvalho¹, Fernando Rodrigues Goulart Bergamini¹, Pedro Paulo Corbi¹

Affiliation

¹ Institute of Chemistry, University of Campinas - UNICAMP, Campinas - SP 13083-970, Brazil.

Abstract

It is demonstrated here that tridentate imine ligands can control the nuclearity of copper(II) complexes based on the donor atoms present in the ligand. The N,N',N''-donating imine ligand led to a mononuclear compound, namely di-chlorido-[N,N-dimethyl-N'-(pyridin-2-yl-methyl-idene)ethane-1,2-di-amine]copper(II) monohydrate, [CuCl₂(C₁₀H₁₅N₃)]·H₂O, 1, while the N,N',O-donating imine ligand produced a binuclear metal complex, namely μ₂-chlorido-di-chlorido-(μ₂-2-{[2-(di-methyl-amino)-ethyl]imino-methyl}phenolato)(N,N-dimethyl-ethylene-di-amine)-dicopper(II) 0.11-hydrate, [Cu₂(C₁₁H₁₅N₂O)Cl₃(C₄H₁₂N₂)]·0.11H₂O, 2. The structure of 2 is a remarkable example of a binuclear copper(II) complex containing a single substituted 2-imino-methyl-phenolate ligand that has two copper(II) sites in square-pyramidal coordination.

Keywords: binuclear copper(II) complexes; crystal structure; imine; mononuclear copper(II) complexes; tridentate ligand.

Grants and funding

This work was funded by Conselho Nacional de Desenvolvimento Científico e Tecnológico grants 140466/2014-2 and 140707/2013-1. Fundação de Amparo à Pesquisa do Estado de São Paulo grants 2015/ 25114-4 and 2015/20882-3.