Utility of all-pyrazole heteroscorpionates in f-element chemistry

Abstract

A new generation of heteroscorpionates, known as all-pyrazole heteroscorpionates is dicussed as a platform for the generation of f-element compounds with robust structural diversity, desirable photoluminescent and molecular magnetism properties.

Activation and functionalisation of carbon dioxide by bis-tris(pyrazolyl)borate-supported divalent samarium and trivalent lanthanide silylamide complexes

“…Trofimenko's tridentate scorpionate N-donor hydrotris(1-pyrazolyl)borate (Tp) ligand and its derivatives (Tp R ) are robust ancillary ligands in Ln chemistry, which provide great structural diversity to Ln complexes and result in useful physical (optical, magnetic) and chemical (small-molecule activation, catalysis) properties. 17 The Sm( ii ) complexes [Sm(Tp R ) 2 ] display activation of a wide range of small-molecules (CO, 18 NO, 19 O 2 , 20 S 8 , 21 dichalcogenides, 22 azobenzene, 23 aldehyde, 24 ketones, 24,25 quinones, 24,25 azines 24 ). Reduction of heavy-metal (Hg( i ), Tl( i )) salts with [Sm(Tp*) 2 ] (Tp* = hydrotris(3,5-dimethyl-1-pyrazolyl)borate) was utilised to synthesise organometallic complexes: (a) the first Tp/cyclopentadienyl-mixed complex of a lanthanide 26 and (b) an alkynide.…”