Observation of π-hole interactions in the solid state structures of three new copper(II) complexes with a tetradentate N4 donor Schiff base: Exploration of their cytotoxicity against MDA-MB 468 cells

A Combined Experimental and Theoretical Study on the Formation of a Cyclic Tetrameric Water Cluster and a Similar Type of Cyclic Cluster in Copper(II) Schiff Base Complexes

“…UV spectra of complexes 1 and 2 are given in Figures S5–S6 respectively (Supplementary materials). Room temperature magnetic susceptibility measurements show that both complexes have magnetic moments close to 1.73 BM, as expected for a discrete magnetically non‐coupled spin‐only copper(II) center …”

Chirality‐Induced Variation in Interaction of Two Similar Copper(II) Coordination Polymers with Calf Thymus DNA: Exploration of Their Antimicrobial Activity and Cytotoxicity

“…The electronic spectrum of each complex in acetonitrile displays single broad absorption band due to d‐d transitions around 605 nm . The UV absorption bands around 290 nm may be assigned to intra ligand n‐π * transitions of azomethine (C=N) function of Schiff base .…”

End-on cyanate or end-to-end thiocyanate bridged dinuclear copper(ii) complexes with a tridentate Schiff base blocking ligand: synthesis, structure and magnetic studies

“…Single crystal X-ray crystallography reveals that complex 1 is a centrosymmetric dimer and crystallizes in the monoclinic space group P2 1 /c. The asymmetric unit contains a copper (II) centre, which adopts a elongated (4+1) square pyramidal geometry, bonded to three donor atoms 14Cu(1)-N(1') 1.9375 121.9635 14Cu(1)-N(4) 1.9504(12) 1.9572 (13) Cu(1)-N(1') a 2.7216 (13) 1.958 3Cu(1)-S(3') a -2.7729 5The hydrogen atom, H(1), attached to the amine nitrogen atom, N(1), forms intra dimer hydrogen bond with the symmetry related ( a = 1-x,1-y,1-z) phenoxo oxygen atom, O(7) a , depicted in Fig. 2.…”

“…Hydrogen atoms have been omitted for clarity. Symmetry transformation: a = 1-x,1-y,1-z.The Addison parameter13 (trigonality index, τ = (α-β)/60, where α and β are the two largest L-M-L angles of the coordination sphere) is zero for a perfectly square pyramidal and is one for a perfectly trigonal bipyramidal complex. The Addison parameter value (τ) is 0.102 indicating the coordination sphere around copper(II) centre very close to ideal square-pyramidal geometry.…”