Secondary Sphere Hydrogen Bonding in Monocopper Complexes of Potentially Dinucleating Bis(carboxamide) Ligands.

ABSTRACT: Reaction of a macrocyclic ligand precursor comprising two bis(carboxamido)pyridine units (H₄L4) connected by ethylene linkers with NMe₄OH and CuX₂ (X = Cl, OAc, or OTf) yielded monocopper complexes [NMe₄][(H₂L4)Cu(X)] (X = Cl (3), OAc (4), or OH (5)), in contrast to previous work using a related ligand with ortho-phenylene linkers wherein dicopper compounds were isolated. X-ray structures of the complexes revealed hydrogen bonding from the free carboxamide N-H groups in the doubly protonated form of the ligand (H₂L4^- ) to the monodentate fourth ligand coordinated to the Cu(II) ion. Similar secondary sphere hydrogen bonding interactions were identified in multinuclear compounds [N

SUBMITTER: Neisen BD 

PROVIDER: S-EPMC5102625 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature