1227512-79-9Relevant articles and documents
Building complexity in O2-binding copper complexes. site-selective metalation and intermolecular O2-binding at dicopper and heterometallic complexes derived from an unsymmetric ligand
Serrano-Plana, Joan,Costas, Miquel,Company, Anna
supporting information, p. 12929 - 12938 (2015/02/19)
A novel unsymmetric dinucleating ligand (LN3N4) combining a tridentate and a tetradentate binding sites linked through a m-xylyl spacer was synthesized as ligand scaffold for preparing homo- and dimetallic complexes, where the two metal ions are bound in two different coordination environments. Site-selective binding of different metal ions is demonstrated. LN3N4 is able to discriminate between CuI and a complementary metal (M′ = CuI, ZnII, FeII, CuII, or GaIII) so that pure heterodimetallic complexes with a general formula [CuIM′(LN3N4)]n+ are synthesized. Reaction of the dicopper(I) complex [CuI2(LN3N4)]2+ with O2 leads to the formation of two different copper-dioxygen (Cu2O2) intermolecular species (O and TP) between two copper atoms located in the same site from different complex molecules. Taking advantage of this feature, reaction of the heterodimetallic complexes [CuM′(LN3N4)]n+ with O2 at low temperature is used as a tool to determine the final position of the CuI center in the system because only one of the two Cu2O2 species is formed.
Synthesis and characterisation of low valent Mn-complexes as models for Mn-catalases
Berggren, Gustav,Huang, Ping,Eriksson, Lars,Styring, Stenbjoern,Anderlund, Magnus F.,Thapper, Anders
experimental part, p. 11035 - 11044 (2011/01/05)
In this work we report the synthesis of two novel manganese complexes, [L13MnII6](ClO4)6 (1·(ClO4)6) and [L2MnII 2(μ-OAc)(μ-Cl)](ClO4)2 (2·(ClO4)2), where L12- is the 2,2′-(1,3-phenylenebis(methylene))bis((2-(bis(pyridin-2-ylmethyl)amino) ethyl)azanediyl)diacetic acid anion and L2 is N1,N1′-(1,3- phenylenebis(methylene))bis(N2,N2′-bis(pyridin-2-ylmethyl)ethane-1, 2-diamine). The ligands Na2L1 and L2 are built on the same backbone, L2 only contains nitrogen donors, while two carboxylate arms have been introduced in Na2L1. The two complexes have been characterized by single-crystal X-ray diffraction, magnetic susceptibility, EPR spectroscopy, and electrochemistry. X-Ray crystallography revealed that 1 is a manganese(ii) hexamer and 2 is a manganese(ii) dimer featuring an unprecedented mono-μ-acetato, mono-μ-chlorido bridging motif. The ability of the complexes to catalyse H2O2 disproportionation, thereby acting as models for manganese catalases, has been investigated and compared to the activity of two other related manganese complexes. The introduction of carboxylate donors in the ligands, leading to increased denticity, resulted in a drop in H2O2 disproportionation activity. The Royal Society of Chemistry 2010.
