Synthesis and characterization of pendant arm encapsulated complexes of cobalt(III)

Achilleos A.A., Gahan L.R. and Nicolaidis K.A. (1989) Synthesis and characterization of pendant arm encapsulated complexes of cobalt(III). Australian Journal of Chemistry, 42 5: 649-657. doi:10.1071/CH9890649


Author Achilleos A.A.
Gahan L.R.
Nicolaidis K.A.
Title Synthesis and characterization of pendant arm encapsulated complexes of cobalt(III)
Journal name Australian Journal of Chemistry   Check publisher's open access policy
ISSN 1445-0038
Publication date 1989
Sub-type Article (original research)
DOI 10.1071/CH9890649
Volume 42
Issue 5
Start page 649
End page 657
Total pages 9
Subject 1600 Chemistry
Abstract The synthesis and characterization of an octahedral cobalt(III) complex of the octaamine ligand 5, 5-bis(4-amino-2-azabutyl)-3, 7-diazanonane-l, 9-diamine, [co(asen)]3+, is described. Two approaches to the preparation of encapsulated derivatives of [co(asen)]3+ are also described. The first approach involves reaction of [co(asen)]3+ with nitromethane and formaldehyde in the presence of base. After extensive chromatographic purification [(1-(4-amine-2-azabutyl)-8-nitro-3, 6, 10, 13, 16, 19-hexaazabicyclo[6.6.6]icosane)cobalt(III)]5+ was isolated. The second more convenient method employs precautionary protection of the pendant primary amine of [co(asen)]3+, as the benzenesulfonate, prior to reaction with the same capping reagents. Both approaches result in an encapsulated complex bearing a pendant 4-amine-2-azabutyl moiety. The protecting group is stable under reaction conditions required for successive chemical modifications of the capping nitro group to amine, chloro and proton capped cages, but is readily removed in refluxing acidic solution.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 28 Jun 2016, 04:05:45 EST by System User