Heterobinuclear Zn-Ln and Ni-Ln complexes with schiff-base and carbacylamidophosphate ligands: Synthesis, crystal structures, and catalytic activity

Abstract

The reaction of Salen-like ZnII and NiII precursors with carbacylamidophosphate lanthanide moieties yields six new types of 3d-4f compounds. The complexes were characterized by means of 1H, 31P NMR and IR spectroscopy, elemental analysis, ESI mass spectrometry, and X-ray diffraction analysis. Depending on the Schiff base ligands, the NiII ion adopts either a square-planar or an octahedral geometry, whereas the ZnII ion has a tetragonal-pyramidal geometry. The coordination number of lanthanides is nine or ten. Hydrolytic activities of some heterobimetallic Zn-Ln and Ni-Ln coordination compounds in the reaction of intramolecular hydrolytic degradation of the 2-(hydroxypropyl)-p-nitrophenyl phosphate were investigated. Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.