First metallamacrocyclic complexes of Pt(iv) with 3,3,3′,3′-tetraalkyl-1,1′-phenylenedicarbonylbis(thioureas): synthesis by direct or electrolytic oxidative addition of I2, Br2 and Cl2

Indium(iii) {2}-metallacryptates assembled from 2,6-dipicolinoyl-bis(N,N-diethylthiourea)

{2}-Metallacryptates are constructed from the self-assembly of 2,6-dipicolinoylbis(N,N-diethylthiourea) ligands and mixtures of indium(iii) chloride and chlorides of monovalent cations.

Reversible photo-isomerization of cis-[Pd(L-κS,O)2] (HL = N,N-diethyl-N'-1-naphthoylthiourea) to trans-[Pd(L-κS,O)2] and the unprecedented formation of trans-[Pd(L-κS,N)2] in solution

Upon ex situ UV-visible light irradiation, complex cis-bis(N,N-diethyl-N'-naphthoylthioureato)-palladium(ii), cis-[Pd(L-κS,O)2], undergoes isomerization in acetonitrile-d3 and chloroform-d to yield trans-[Pd(L-κS,O)2] which then rearranges thermally to novel trans-[Pd(L-κS,N)2] prior to reverting thermally to the cis isomer in the absence of light. The thermal isomerization rate is highly solvent dependent and harnessed to enable each of these three geometric isomers to be isolated and characterized by 1H NMR spectroscopy, X-ray crystallography, melting point and thermal analysis. The formation of the trans-[Pd(L-κS,N)2] isomer as part of this isomerization has only been observed with the sterically demanding cis-bis(N,N-diethyl-N'-(naphthoylthioureato)palladium(ii) precursor based on our knowledge to date. In situ irradiation with monochromatic laser light (λ = 355 nm) coupled to 1H NMR spectroscopy of solutions of cis-[Pd(L-κS,O)2] in acetonitrile-d3 supports the ex situ photo-induced isomerization experiments.

Self-assembled Cu(ii) and Ni(ii) metallamacrocycles formed from 3,3,3′,3′-tetrabenzyl-1,1′-aroylbis(thiourea) ligands: DNA and protein binding studies, and cytotoxicity of trinuclear complexes

The synthesis and characterization of metallamacrocyclic square planar Ni(ii) and Cu(ii) complexes and the interaction of cytotoxic trinuclear complexes with CT DNA and BSA protein are described.