Three new multinuclear motifs in Cu(II)-pyrazolate chemistry

Combining the tendencies of copper(II)-pyrazolato complexes to form trinuclear or oligonuclear rings with its coordination plasticity, three new structural motifs have been recognized: An hexanuclear assembly of two triangular Cu3-units held together by a single H-bond (1); a dodecanuclear structure composed of triangular and linear-chain units (2); and an octanuclear ring encapsulating two glycerate trianions (3) have been structurally characterized by single crystal X-ray diffraction.

Hexa-, octa- and dodecanuclear copper(II) assemblies are supported by pyrazolato ligands.Figure optionsDownload as PowerPoint slideHighlights
► A single H-bond connects two trinuclear copper units.
► Linear and triangular units combine forming polynuclear motifs.
► Glycerol is sequestered by an octanuclear copper host ring.