266340-10-7Relevant academic research and scientific papers
Divalent samarium compounds with heavier chalcogenolate (EPh; E = Se, Te) ligands
Freedman, Deborah,Kornienko, Anna,Emge, Thomas J.,Brennan, John G.
, p. 2168 - 2171 (2000)
Crystalline coordination complexes of Sm(EPh)2 (E = Se, Te) are described. The selenolate compound Sm(SePh)2 is unstable in solution, but a divalent selenolate can be prepared and isolated when precisely 1 equiv of Zn(SePh)2 is present to form heterometallic [(THF)3Sm(μ2-SePh)3Zn(μ2-SePh)](n) (1). This compound is a 1D coordination polymer with alternating Sm(II) and Zn(II) ions connected by an alternating(1,3) number of bridging selenolate ligands and three THF ligands bound to each Sm(II) ion. The tellurolate Sm(TePh)2 forms a stable pyridine coordination compound (py)5Sm(TePh)2 (2) that is isostructural with known Eu and Yb benzenetellurolates. Both compounds were characterized by conventional spectroscopic methods. Polymer 1 was characterized by low-temperature single-crystal X-ray diffraction, and the unit cell of the tellurolate was determined. Crystal data (Mo Kα, 153(5) K) are as follows. 1: Monoclinic space group P21, a = 10.666(2) A, b = 16.270(3) A, c = 12.002(3) A, β = 114.81(2)°, Z = 2.2: orthorhombic space group Pbca, with a = 13.865(3) A, b = 16.453(5) A, c = 31.952(7) A, Z = 8.
