Synthesis and Characterization of Novel Dinuclear Copper(I) Complexes. Dimerization of [CuL(PPh₃)₂] (L = methyl 3-hydroxy-3-(p-R-phenyl)-2-propenedithioate)

Abstract

We report the synthesis of new copper(I) complexes 6a-e from methyl 3-hydroxy-3-(p-R-phenyl)-2-propenedithioate ligands. These complexes were characterized by IR and 1H, 13C, and 31P NMR spectroscopy. The expected O,S-coordination mode was confirmed by the X-ray diffraction studies of 6b and 6e. The unexpected dimerization of 6b-e leads to the formation of four novel dinuclear copper(I) compounds (7b-e). The dinuclear complex structure was fully established by the X-ray diffraction analysis of 7a, in which the presence of a Cu-Cu interaction was observed.

Synthesis of a One-Dimensional Coordination Polymer of Nickel(II) Complex with a β-Oxodithioester Ligand

“…These signals were low energy-shifted . The changes on C-O, C=S, and C=C energy vibrations suggest the electron delocalization on the 6-membered chelated ring of the complex [17].…”

Half-sandwich titanium complexes with β-oxodithioester ligands

“…Ligands 1e5 were previously described in the literature and were synthesized according to a modification made on the published method [22]. This modification involves a one-pot procedure, treating the acetophenone derivative with KO t Bu followed by the addition of CS 2 and the subsequent methylation reaction using MeI, yielding the desired ligands 1À5 (Fig.…”

“…Indeed, the combination of cyclopentadienyl and ancillary ligands bearing both soft and hard donor atoms [O,S] can yield titanium complexes with interesting applications and structural features [20,21]. In this regard, our research group reported on the preparation of copper (I) complexes derived from b-oxodithioester ligands, namely methyl 3-(4 0 -X-phenyl)-3-hydroxy-2-propenedithioate [22]. These ligands have received considerable attention due to their similarity with monothio-bdiketones [23], which is in part responsible for their stability and ability to show delocalization over six-membered chelated ring systems.…”

“…In this regard, our research group reported on the preparation of copper (I) complexes derived from b-oxodithioester ligands, namely methyl 3-(4 0 -X-phenyl)-3-hydroxy-2-propenedithioate [22]. These ligands have received considerable attention due to their similarity with monothio-bdiketones [23], which is in part responsible for their stability and ability to show delocalization over six-membered chelated ring systems.Herein, we report on the preparation of titanium half-sandwich complexes supported by methyl 3-(4 0 -X-phenyl)-3-hydroxy-2-propenedithioate ligands (X ¼ H, Me, OMe, Cl, Br), their molecular structures and a modified procedure for the preparation of the ligands. …”

Copper(i) and nickel(ii) complexes with 1 : 1 vs. 1 : 2 coordination of ferrocenyl hydrazone ligands: Do the geometry and composition of complexes affect DNA binding/cleavage, protein binding, antioxidant and cytotoxic activities?

“…1. The crystallographic data, along with a selection of bond lengths and bond angles, are presented in Tables 1 and 2 47 The unit cell packing of complex 3 is shown in the Fig. S1.…”