Drei Formen des Samarium(III)-Sulfidselenids Sm2S2-xSe1+x (0,1 ≤ x < 0,2) / Tree Types of the Samarium(III) Sulfide Selenide Sm2S2-xSe1+x (0,1 ≤ x < 0,2)
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Falk Lissner
Single crystals of Sm2S2-xSe1+x (0.1 ≤ x < 0.2) have been obtained for the first time through the oxidation of KSm2Cl5 with an excess of sulfur and selenium in equimolar amounts at 850 °C after seven days in evacuated silica tubes. They emerged as almost black, in thin layers deep red, lath-shaped needles (A and U type, respectively) as well as red, bead-shaped polyhedra (C type) of the gross chemical composition Sm2S2Se according to X-ray structure analyses. A much simpler method of synthesis is based on the direct fusion of the elements (samarium, sulfur and selenium) in appropriate molar ratios (2:2:1) in the presence of NaCl as a flux under otherwise analogous conditions (silica tubes, 7 d, 850 °C). A-Sm2S1.82Se1.18 crystallizes orthorhombically (a = 753.1(3), b = 401.9(1), c = 1565.8(6) pm, Z = 4) in the space group Pnma with the α-Gd2S3-type structure. Two crystallographically different Sm3+ cations are coordinated by eight (Sm1) and seven (Sm2) Ch2- anions (S2- and Se2-) as biand monocapped trigonal prisms, respectively. C-Sm2S1.90Se1.10 adopts the cubic γ-Ce2S3-type structure (I4̅3d; a = 858.7(2) pm, Z = 5.333) with trigon-dodecahedrally coordinated Sm3+ cations (CN = 8 ). Finally, U-Sm2S1.84Se1.16 with the orthorhombic U2S3-type structure (Pnma; a = 1105.3(6), b = 399.2(1), c = 1074.0(5) pm, Z = 4) exhibits two crystallographically different Sm3+ cations again, which are coordinated by seven (Sm1) and seven plus one (Sm2) Ch2- anions, respectively. The preferential occupation of S _ and Se2- anions at only one in the C-type, but three anionic sites each in the A- and U-type crystal structures of Sm2S2-xSe1+x (0 .1 ≤ x < 0.2 ) is discussed.
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- Tetraberyllium-η4-oxo-hexa(arylcarboxylates)
- Drei Formen des Samarium(III)-Sulfidselenids Sm2S2-xSe1+x (0,1 ≤ x < 0,2) / Tree Types of the Samarium(III) Sulfide Selenide Sm2S2-xSe1+x (0,1 ≤ x < 0,2)
- Investigations on the Thermal Decomposition of Coordination Polymers Based on Copper(I) Halides and 2-Methylpyrazine
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Artikel in diesem Heft
- Darstellung und Strukturaufklärung von Tricäsiumundecaphosphid- Ammoniakat(1/3) Cs3P11 · 3 NH3 / Synthesis and Crystal Structure of Tricesium Undecaphosphide-Ammonia(l/3) Cs3P11 · 3 NH3
- Magnetic Properties and Crystal Structure of a 3,5-Dimethylpyrazolate-Bridged Binuclear Copper(II) Complex
- Enantioselective Catalysis, 139 [1]. A Chiral Cyclic Amidine Containing a Pyridine Substituent - Synthesis, Coordination Chemistry, Catalysis
- Tetraberyllium-η4-oxo-hexa(arylcarboxylates)
- Drei Formen des Samarium(III)-Sulfidselenids Sm2S2-xSe1+x (0,1 ≤ x < 0,2) / Tree Types of the Samarium(III) Sulfide Selenide Sm2S2-xSe1+x (0,1 ≤ x < 0,2)
- Investigations on the Thermal Decomposition of Coordination Polymers Based on Copper(I) Halides and 2-Methylpyrazine
- Crystal Structure and Tautomerism of 1-[N-(4-Iodophenyl)]aminomethylidene-2(1H)naphthalenone
- N-Silylaminotin Trichlorides. Synthesis and Characterisation by Multinuclear Magnetic Resonance Spectroscopy
- Synthese und Eigenschaften von 2-Cyanimino-l,3-dimethylimidazolin [1] / Synthesis and Properties of 2-Cyanimino-l,3-dimethylimidazoline [1]
- Synthesis and Crystal Structure of (dmaaH)2(dmaH)2[P12Sn12N12(NH)2] · 4 dmaa, dmaa = N,N-Dimethylacetamide, dma = Dimethylamine, an Anhydrous Example of the P12N14Cage
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- Synthesis and Structural Studies of 5, 11, 17, 23-Tetrahydroxyresorc[4]arenes
- Enaminones as Building Blocks In Heterocyclic Synthesis: A New One Pot Synthesis of Polyfunctional Substituted Pyridines
- Remangilone D, a New Bisnoroleanane Triterpene, and a New Flavone from Physena madagascariensis [1]
- Notizen: Metallkomplexe mit biologisch wichtigen Liganden, CXXXIX [1], Ein Ferrocenylen-verbrücktes Pseudohexapeptid Fe[C5H4CH 2OGlyValOMe(Val-Boc)]2 / Metal Complexes of Biologically Important Ligands, CXXXIX [1]. A Ferrocenylene Bridged Pseudohexapeptide Fe[C5H4CH 2OGlyValOMe(Val-Boc)]2
