Synthesis and x-ray crystal structure of the divalent [bis(trimethylsilyl)amido] samarium complexes [(Me3Si)2N]2Sm(THF)2 and {[(Me3Si)2N]Sm(.mu.-I)(DME)(THF)}2

Beyond Samarium Diiodide: Vistas in Reductive Chemistry Mediated by Lanthanides(II)

“…(4)]. [48] These ligands allow fine-tuning of the properties of the samarium(II) complex by modulating the redox potential of the system and providing more sterically encumbered reductants. In addition, samarium(II) amides are useful because of their favorable solubility in comparison to SmI 2 .…”

“…[49] [48] and upon THF dissociation the metal center might be more available for interaction with substrates. Detailed examination of activation parameters suggested that the reduction of alkyl iodides and ketones with [Sm(hmds) 2 ] proceeds through an innersphere mechanism (Scheme 19), thus validating the mechanistic proposal.…”

A bis(2,6-di-tert-butyl-4-methylphenolato)samarium(II) complex, [Sm(OAr)2(thf)3].thf

“…Divalent samarium complexes are strong reducing agents and structurally defined soluble Sm n complexes are rare (Bel'sky, Gunko, Bulychev, Sizov & Soloveichik, 1990;Evans, Bloom, Hunter & Atwood, 1981;Evans, Drummond, Zhang & Atwood, 1988;Evans, Grate, Choi, Bloom, Hunter & Atwood, 1985). We are interested in the chemical behaviour of Sm xI complexes having different ligands.…”

Bis(phosphinimino)methanides as Ligands in Divalent Samarium Chemistry: Synthesis, Structures and Catalysis

“…334.14(9) and 335.53(9) pm]. [25] As observed for 1 and 2, the six-membered N1-P1-C1-P2-N2-Sm ring in 3, which is formed by the {CH(PPh 2 NSiMe 3 ) 2 …”

“…The solid-state structure of 3 was also determined by single-crystal X-ray diffraction (Figure 3). It crystallizes in the monoclinic space group C2/c with one molecule of toluene and forms a dimer in the solid state in which the metal centers are symmetrically bridged by one iodine atom and the nitrogen atom of the [25] in which the {N(SiMe 3 ) 2 } -groups are terminally bonded. The Sm-I bond length of 328.33(4) pm is a bit shorter than in [Sm{N(SiMe 3 ) 2 }(µ-I)(DME)(thf)] 2 [e.g.…”