Bulletin of Japan Society of Coordination Chemistry
Online ISSN : 1883-1737
Print ISSN : 1882-6954
ISSN-L : 1882-6954
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Macrocyclic Ligands for Molecular Hydrides of s-Block Metals
Priyabrata GhanaJun Okuda
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2021 年 77 巻 p. 37-45

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In organometallic chemistry and homogeneous catalysis, the design and development of ancillary ligands are pivotal in order to control the central metalʼs reactivity. Whilst for classical late transition and precious metals, phosphines and N-heterocyclic carbenes have been successfully introduced to generate reactive, and even stereochemically defined sites, the search for suitable ancillary ligands for larger, more electropositive metals of s-, p-, d-, and f-block is often more difficult. We have introduced NNNN-type macrocyclic ligands based on cyclen (1,4,7,10-tetraazacyclododecane or [12]aneN4, viz. the amido triamine ligand Me3TACD and the neutral tetraamine ligand Me4TACD. Both ligands have been used to solubilize insoluble solid-state hydrides, currently of interest as hydrogen storage materials, to give molecular hydrides with interesting reactivity toward small molecules such as H2 and CO2.

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