A new oxamato-bridged heterotrinuclear Ni^IICu^IINi^II complex: synthesis, structure and properties

Abstract

A new oxamato-bridged Ni^IICu^IINi^II species, [Ni(iprtacn)]₂[Cu(pba)(H₂O)_0.5](BPh₄)₂ (1), (iprtacn = 1,4,7-triisopropyl-1,4,7-triazacyclononane; pba = 1,3-propylenebis(oxamato)) has been synthesized and structurally as well as magnetically characterized. Complex 1 has a discrete trinuclear Ni^IICu^IINi^II structure: Two nickel(II) ions are bridged by [Cu(pba)]²⁻ with the macrocyclic ligand iprtacn a terminal ligand of nickel(II). Fitting the magnetic data of 1 led to g _Cu = 2.16, g _Ni = 2.18, J = −112.5 cm⁻¹, D = ±7.78 cm⁻¹. The irregular spin state structure and interaction of complex 1with DNA are described here.

Keywords:

• Heterotrinuclear Ni^IICu^IINi^II complex
• Magnetic properties
• Irregular spin state
• Interaction with DNA

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 20331020).