Autocatalytic Creation of Closed Dimer and Extended Helix Metallosupramolecular Architectures

Abstract

Hybrid architectures: Self‐organization of the xylyl‐linked dicobalt(III) complex with an L‐cysteine residue into homochiral dimeric and helix supramolecular structures is reported (see figure). These two structures were randomly and exclusively formed in the absence of any external stimuli if [HgBr4]2− was incorporated as the counter ion, thanks to the conformational bistability of the xylyl linker.

Synthesis and crystallographic characterization of a mononuclear cobalt(III) complex possessing both thiolate and thioether donors: reactivity of an thiolate-bridged pentanuclear Co2Ag3 complex with iodomethane

“…In the course of our continuing study of the alkylation reaction of metal complexes with aminothiolate ligands (Okamoto et al, 1999;Chikamoto et al, 2005Chikamoto et al, , 2007Yoshinari & Konno, 2008, 2009, we herein report that an S-bridged Ag I 3 Co III 2 pentanuclear complex, {Ag 3 [Co(L)] 2 } 3+ [L 3-= N(CH 2 NHCH 2 CH 2 S À ) 3 ] (Tokuda et al, 2000), in which two tris(thiolate)-type octahedrally shaped Co III moieties with an aet derivative ligand, [Co(L)], are linearly linked by three Ag I ions, reacts with iodomethane to give a mono(thiolate)bis(thioether)-type complex, [Co(LMe 2 )] 2+ [LMe 2 À = N(CH 2 NHCH 2 CH 2 S À )(CH 2 NHCH 2 CH 2 SCH 3 ) 2 ]. It is noteworthy that the complex was crystallized as a hexafluoridophosphate salt, [Co(LMe 2 )](PF 6 ) 2 , and its molecular structure was fully determined by single-crystal X-ray diffraction analysis.…”