A novel samarium(ii) complex bearing a dianionic bis(phenolate) cyclam ligand: synthesis, structure and electron-transfer reactions.

Content Provider	Semantic Scholar
Author	Maria, Leonor Soares, Marina Mendes Santos, Isabel C. Sousa, Vânia R. Mora, Elsa Marçalo, Joaquim Luzyanin, Konstantin V.
Copyright Year	2016
Abstract	The reaction of the hexadentate dianionic 1,4,8,11-tetraazacyclotetradecane-based bis(phenolate) ligand, (tBu2ArO)2Me2-cyclam(2-), with [SmI2(thf )2] in thf resulted in the formation of the divalent samarium complex [Sm(κ(6)-{(tBu2ArO)2Me2-cyclam})] (1). X-ray diffraction studies revealed that after recrystallization from n-hexane/thf complex 1 has a monomeric structure and does not contain thf molecules coordinated to the Sm(II) center. However, UV-vis and (1)H NMR spectroscopy of 1 evidenced the formation of thf-solvated complexes in neat thf. Reductive studies show that complex 1 can act as a single electrontransfer reagent and form well-defined Sm(III) species. The reaction of 1 with several substrates, namely, TlBPh4, pyridine N-oxide, OPPh3, SPPh3 and bipyridines, are reported. Spectroscopy studies, including NMR, and single crystal X-ray diffraction data are in agreement with the formation of cationic Sm(III) species, monochalcogenide bridged Sm(III) complexes and Sm(III) complexes with bipyridine radical ligand, respectively.
File Format	PDF HTM / HTML
DOI	10.1039/c5dt04647e
PubMed reference number	26818107
Journal	Medline
Volume Number	45
Issue Number	9
Alternate Webpage(s)	https://livrepository.liverpool.ac.uk/3002977/2/Dalton-2016-Sm.pdf
Alternate Webpage(s)	https://doi.org/10.1039/c5dt04647e
Journal	Dalton transactions
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article