Synthesis and reactivity of aza-capped encapsulated cobalt(III) ions

Creaser, I. I.; Geue, Rodney J.; Harrowfield, J. M.; Herlt, Anthony J.; Sargeson, Alan M.; Snow, Michael R.; Springborg, J.

doi:10.1021/ja00386a030

Cited by 191 publications

(94 citation statements)

References 1 publication

(2 reference statements)

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“…The synthetic protocol was adapted from the literature [46]. In brief, NH 4 A dark orange-red solid was collected via vacuum filtration and was washed with 20:80 dichloromethane/hexane solutions until the filtrate was no longer green in color.…”

Section: Chemical Synthesis Of Cobalt Sepulchrate Trichloridementioning

confidence: 99%

Detection of 25-Hydroxyvitamin D3 with an Enzyme modified Electrode

Ozbakir¹,

Sambade²

2016

J Biosens Bioelectron

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Section: Chemical Synthesis Of Cobalt Sepulchrate Trichloridementioning

confidence: 99%

Detection of 25-Hydroxyvitamin D3 with an Enzyme modified Electrode

Ozbakir¹,

Sambade²

2016

J Biosens Bioelectron

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“…Replacement of N donors with thioethers in the case of the sarcophagine complexes causes a positive shift in metal centred redox potentials ([Co (MeN 6 sar) 6 and Me 5 tricosatrieneN 6 , the position of the metal centred redox potential is predominantly influenced by steric factors due to the methyl substituents on each encapsulating arm rather than the composition of the donor set.…”

Section: 18mentioning

confidence: 99%

“…The imine bond is located between atoms N1 and C9. The Co-N imine bond (1.919(3) Å) ( Table 6) is seen to be significantly shorter than the Co-N amine bonds (1.974(3), Table 4 Selected interatomic distances (Å) and angles (Њ) for endo3ؒCl(PF 6 …”

Section: 33mentioning

confidence: 99%

Embracing ligands. A synthetic strategy towards new nitrogen–thioether multidentate ligands and characterization of the cobalt(iii) complexes

2003

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The synthesis of the hexadentate ligand 2,2,9,9-tetra(methyleneamine)-4,7-dithiadecane (EtN 4 S 2 amp) is reported. The ligand is of a type in which bifurcations of the chain occur at atoms other than donor atoms. The cobalt() complex [Co(EtN 4 S 2 amp)] 3ϩ (1) was isolated and characterized. The synthetic methodology also results in a number of by-products, notably 2,9,9-tris(methyleneamine)-9-methylenehydroxy-4,7-dithiadecane (Et(HO)N 3 S 2 amp) and an eleven-membered pendant arm macrocyclic ligand 6,10-dimethyl-6,10-bis(methyleneamine)-1,4-dithia-8-azaacycloundec-7-ene (dmatue). The complexes [Co(Et(HO)3ϩ (2), in which the alcohol is coordinated to the metal ion, and [Co(dmatue)Cl] 2ϩ (4) were isolated and characterized. Et(HO)N 3 S 2 amp also undergoes complexation with cobalt() to produce two isomers endo- [Co(Et(HO)(exo-3), both with an uncoordinated alcohol group. endo-3 has the alcohol positioned cis, and exo-3 trans, to the sixth metal coordination site. Reaction of 1 with isobutyraldehyde, paraformaldehyde and base in dimethylformamide results in the encapsulated complex [Co(1,5,5,9,13,7,11,]-docosa-3,14-diene)](ClO 4 ) 3 ؒ2H 2 O ([Co(Me 6 docosadieneN 4 S 2 )] 3ϩ (5). All complexes have been characterized by single crystal X-ray study. The low-temperature (11 K) absorption spectrum of 1 has been measured in Nafion films with spin-allowed

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“…The synthesis followed on from the groundbreaking publication reporting the analogous chemistry with ammonia, instead of nitromethane, as the capping reagent to create the first cage ligand sepulchrate complexed to Co III and Co II . [3,4] There can be few better examples of the elegance of Sargeson 'cage chemistry' than this. The extraordinary ease by which this reaction proceeded made a lasting personal impression and in the years to come I was drawn further into the field of metal-directed chemistry and macrocyclic ligand systems.…”

mentioning

confidence: 99%

Foreword to Professor Alan M. Sargeson Special Issue

Bernhardt

2009

Aust. J. Chem.

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Synthesis and reactivity of aza-capped encapsulated cobalt(III) ions

Cited by 191 publications

References 1 publication

Detection of 25-Hydroxyvitamin D3 with an Enzyme modified Electrode

Detection of 25-Hydroxyvitamin D3 with an Enzyme modified Electrode

Embracing ligands. A synthetic strategy towards new nitrogen–thioether multidentate ligands and characterization of the cobalt(iii) complexes

Foreword to Professor Alan M. Sargeson Special Issue

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