Divalent Samarium: Synthesis and Crystal Structures of Sm 4 OCl 6  and KSm 2 Cl 5 | Zendy

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Divalent Samarium: Synthesis and Crystal Structures of Sm 4 OCl 6 and KSm 2 Cl 5

Author(s) -

Schleid Thomas,

Meyer Gerd

Publication year - 1987

Publication title -

zeitschrift für anorganische und allgemeine chemie

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.354

H-Index - 66

eISSN - 1521-3749

pISSN - 0044-2313

DOI - 10.1002/zaac.19875531028

Subject(s) - samarium , monoclinic crystal system , divalent , chemistry , crystallography , tantalum , lithium (medication) , crystal structure , hexagonal crystal system , potassium , inorganic chemistry , medicine , organic chemistry , endocrinology

Single crystals of Sm 4 OCl 6 and KSm 2 Cl 5 have been obtained by metallothermic reductions of SmCl 3 with lithium (in the presence of Sm 2 O 3 or SmOCl) and potassium, respectively, at elevated temperatures in sealed tantalum containers. Sm 4 OCl 6 (hexagonal, P6 3 mc, Z = 2, a = 946.59(4), c = 717.88(4) pm) and KSm 2 Cl 5 (monoclinic, P2 1 /c, Z = 4, a = 888.06(6), b = 784.81(5), c = 1262.77(8) pm, ß = 90.085(6)°) are true divalent samarium compounds, Sm 4 OCl 6 with remarkably short Sm 2+ –O 2− distances (236.0, 237.6 (3x) pm) within the [Sm 4 O] tetrahedron.

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