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Issue 1, 2018
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f-Block complexes of a m-terphenyl dithiocarboxylate ligand

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Abstract

Straightforward syntheses are provided for the m-terphenyl dithiocarboxylic acid 2,6-(C6H4-4-tBu)2C6H3CS2H (TerphCS2H, 2) and its lithium and potassium salts, TerphCS2Li(Et2O)2 and TerphCS2K (1·Et2O and 4, respectively). These compounds can be isolated in good yields on multi-gram scales starting from Terph–I without isolating intermediates. Salt metathesis and protonolysis reactions provided access to the homoleptic actinide(IV) complexes (TerphCS2)4An (An = Th (5) and U (6)). Electrochemical and reactivity studies revealed that the dithiocarboxylate ligand is incompatible with U(III). The homoleptic lanthanum(III) complex (TerphCS2)3La and its η6-toluene adduct (7 and 7·tol, respectively) were also structurally characterized. Binding of toluene to 7 was shown to displace intramolecular La–Carene close contacts that are facilitated by a distortion from the usual geometry of bound dithiocarboxylate ligands.

Graphical abstract: f-Block complexes of a m-terphenyl dithiocarboxylate ligand

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Supplementary files

Article information


Submitted
28 Oct 2017
Accepted
20 Nov 2017
First published
27 Nov 2017

Dalton Trans., 2018,47, 96-104
Article type
Paper

f-Block complexes of a m-terphenyl dithiocarboxylate ligand

M. A. Boreen, B. F. Parker, S. Hohloch, B. A. Skeel and J. Arnold, Dalton Trans., 2018, 47, 96
DOI: 10.1039/C7DT04073C

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