Post-assembly covalent di- and tetracapping of a dinuclear [Fe2L3]4+ triple helicate and two [Fe4L6]8+ tetrahedra using sequential reductive aminations

Glasson, Christopher R.K., Meehan, George V., Davies, Murray, Motti, Cherie A., Clegg, Jack K., and Lindoy, Leonard F. (2015) Post-assembly covalent di- and tetracapping of a dinuclear [Fe2L3]4+ triple helicate and two [Fe4L6]8+ tetrahedra using sequential reductive aminations. Inorganic Chemistry, 54 (14). pp. 6986-6992.

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Abstract

The use of a highly efficient reductive amination procedure for the postsynthetic end-capping of metal-templated helicate and tetrahedral supramolecular structures bearing terminal aldehyde groups is reported. Metal template formation of a [Fe2L3]4+ dinuclear helicate and two [Fe4L6]8+ tetrahedra (where L is a linear ligand incorporating two bipyridine domains separated by one or two 1,4-(2,5-dimethoxyaryl) linkers and terminated by salicylaldehyde functions is described. Postassembly reaction of each of these "open" di- and tetranuclear species with excess ammonium acetate (as a source of ammonia) and sodium cyanoborohydride results in a remarkable reaction sequence whereby the three aldehyde groups terminating each end of the helicate, or each of the four vertices of the respective tetrahedra, react with ammonia then undergo successive reductive amination to yield corresponding fully tertiary-amine capped cryptate and tetrahedral covalent cages.

Item ID: 40401
Item Type: Article (Research - C1)
ISSN: 1520-510X
Keywords: metallo-supramolecular; helicate; assembly; iron; tetrahedra
Funders: Australian Research Council (ARC)
Date Deposited: 09 Sep 2015 04:09
FoR Codes: 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030207 Transition Metal Chemistry @ 25%
03 CHEMICAL SCIENCES > 0303 Macromolecular and Materials Chemistry > 030399 Macromolecular and Materials Chemistry not elsewhere classified @ 50%
03 CHEMICAL SCIENCES > 0305 Organic Chemistry > 030599 Organic Chemistry not elsewhere classified @ 25%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 100%
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