Synthesis and Structure of Lanthanide Aryloxo Complexes and Their Polymerization Behavior for ϵ‐Caprolactone

Abstract

Abstract. Protic exchange reactions of bis(phenolate) lanthanide cyclopentadienyl complexes (C 5 H 5

Lanthanides and actinides: Annual survey of their organometallic chemistry covering the year 2013

“…The complex CpSm(MBMP)(THF) 2 reacted with some monophenols, including 2,6-di-tert-butyl-4-methylphenol, 2,6-diisopropylphenol, 2,6-dimethylphenol and 4-methoxyphenol, in toluene to produce the complexes (MBMP)Sm(OC 6 [44]. The same products have also been reported for the corresponding bis(phenolato) aryloxide complexes of La and Nd [45].…”

“…Under vacuum, the hexanuclear heterobimetallic Y 4 /M 2 -and Y 5 /M-polyhydride complexes were found to release one or two 3 and MeLi has been investigated using XAFS and NMR techniques, notably 45 Sc NMR [117].…”

Actinide Amidinate Complexes with a Dimethylamine Side Arm: Synthesis, Structural Characterization, and Reactivity

“…in tissue engineering and long-term drug delivery systems) as well as in environmentally friendly packaging materials, microelectronics, and adhesives, leading to an increasing demand for polycaprolactone over the last two decades . Therefore, numerous studies involving main-group, transition-metal, and lanthanide catalysts have been carried out, among which lanthanide amidinate complexes have shown high catalytic activities . Despite the large variety of compounds studied as catalysts for the ROP of ε-caprolactone, only a few examples involving actinide complexes have been previously investigated. ,, This can be attributed to the high oxophilicity of the early actinides, which leads to the formation of thermodynamically stable, catalytically inactive actinide–oxo species, impeding the use of the actinide coordination complexes as catalysts in processes involving oxygen-containing substrates; therefore, their use remains a challenge in the field of homogeneous catalysis.…”

Carbon bridged biphenolate ligands in rare earth chemistry

“…34 Historically, the biphenolate ligand has only been utilised as an ancillary ligand in lanthanoid chemistry, 40,43 but as some lanthanoid biphenolate complexes have been shown to be effective and selective catalysts in organic transformations, namely the ring-opening polymerisation of cyclic esters, they have become increasingly studied. 14,17,43,[46][47][48]…”

“…| New J. Chem., 2022,46,[19612][19613][19614][19615][19616][19617][19618][19619][19620][19621][19622][19623][19624][19625][19626][19627][19628] This journal is © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2022 Scheme Metathesis reactions utilising Ce(OTf) 3 and Li 2 mbmp giving the cerium-lithium heterobimetallic [Li(thf) 2 Ce(mbmp) 2 (thf) 2 ], and subsequent ligand exchange reactions (where L = benzophenone) 41. Scheme Synthesis of [Na(dme) 3 ][Ln(edbp) 2 (dme)] (Ln = Er, Yb and Sm) from lanthanoid borohydride starting materials 42.…”