Designed asymmetric coordination helicates with bis-β-diketonate ligands
作者:Rosa Diego、Mohanad Darawsheh、Leoní A. Barrios、Anna Sadurní、Jordi García、Paul Lloyd-Williams、Simon J. Teat、Olivier Roubeau、David Aguilà、Guillem Aromí
DOI:10.1039/c9dt03398j
日期:——
built-up structuralasymmetry yields non-symmetric Fe(III) and Ga(III) dinuclear, triple-stranded helicates by design. Their structural properties have been studied, both in solid state and in solution, and compared with their corresponding symmetric analogues. The robustness observed shows the potential of this synthetic strategy to develop non-symmetric helicoidal motifs with specific functional groups
The synthesis of the new polynucleating ligand 1,3-bis-(3-oxo-3-(2-hydroxyphenyl)-propionyl)-benzene (H4444444L) is reported along with the preparation, structure and properties of its dinuclear complexes [Cu2(H2L)2(py)2]
(1), [Ni2(H2L)2(py)4]
(2), [Mn2(H2L)2(dmf)4]
(3), [Co2(H2L)2(dmf)4]
(4) and [Co2(H2L)2(MeOH)4]
(5), respectively. In complexes 1 to 5, the polydentate ligand is in its bis-deprotonated form, chelating the metals through its β-diketonate moieties. Magnetic measurements show that the metals within these molecules are maintained almost mutually independent.
Molecular [Co(iii)Co(ii)] × 2 assemblies of a new bis-phenol/pyrazolyl ligand
作者:Gavin A. Craig、José Sánchez Costa、David Aguilà、Leoní A. Barrios、Olivier Roubeau、Simon J. Teat、Guillem Aromí
DOI:10.1039/c0nj00861c
日期:——
Use of a novel multinucleating ligand in aerobic reactions with Co(II) affords two novel coordination assemblies exhibiting a rare linear [CoIII2CoII2] structure and novel structural features. The magnetic exchange within these unprecedented moieties is investigated.