Magnetic dimensionality and the crystal structure of two copper(ii) coordination polymers containing Cu₆ and Cu₂ building units

Abstract

The preparation, structural characterization, EPR spectroscopy and magnetic structural correlation of two Cu(ii) coordination polymers are reported.

1D Azido bridged Cu(II) coordination polymer with 1,3‐oxazolidine ligand as an effective catalyst for green click synthesis of 1,2,3‐triazoles

“…[ 32 ] The Cu–N and Cu–O bonds are in the normal range observed for Cu(II) complexes with N‐ and O‐donor ligands. [ 33 ] The intra‐chain hydrogen bonds between OH group of uncoordinated alcoholic arm and coordinated alcoholic functionality together with the OH group of coordinated alcoholic group and terminal azide ligand further stabilize the structure of 1D coordination polymer. These interactions are shown as dashed pink lines in Figure 2b and their information are given in Table S1.…”

Green catalytic synthesis of symmetric and non-symmetric β-hydroxy-1,2,3-triazoles by using epichlorohydrin in the presence of Cu(ii) coordination compounds containing oxazole ligands

“…The Cu–N and Cu–X (X = Cl or Br) bond lengths in these structures are very close to the bond lengths in previously reported Cu( ii ) coordination compounds. 34 The crystal structures of these compounds are stabilized by several C–H⋯O and C–H⋯X (X = Cl or Br) interactions (see Fig. S10 and S11, ESI†).…”

Variations in the structural composition of pyrazole-3,5-dicarboxylato Cu(ii) complexes with 1,2-di(4-pyridyl)ethane synthesized under different conditions

“…The Cu(II)-N and Cu(II)-O bonds vary from 1.916(3) to 2.050(3) Å, whereas Cu1-O13, Cu1-N6, and Cu2-O7A bonds in the axial position are elongated by 2.703(4), 2.641(3), and 2.417(3) Å, respectively, due to the Jahn-Teller distortion. 43,44 The Cu2N 2 O 2 square base is not totally planar with a tetrahedral twist between the planes of 16.97°. Cu2 is shifted towards the axial site by 0.1843(5) Å from the mean basal plane.…”