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Details of the structures of two polymorphs of tris(ethylenediamine)cobalt(III) tetrathioantimonate(V), [Co(C2H8N2)3][SbS4], are reported. The first polymorph crystallizes in the orthorhombic space group Pna21, whereas the second polymorph belongs to the tetragonal space group P42 bc. Both structures contain octahedral [Co(en)3]3+ cations (en is ethylenediamine) and tetrahedral [SbS4]3− anions, which are interconnected via various N-H...S hydrogen bonds to form two different types of three-dimensional network. [ABSTRACT FROM AUTHOR]

A new ternary potassium cobalt stannide, K13CoSn17- x ( x = 0.1), was obtained by reacting the mixture of the corresponding pure elements at high temperature, and structurally characterized by single-crystal X-ray diffraction study. K13CoSn17- x ( x = 0.1) crystallizes in the orthorhombic space group Pbca (No. 61) with a = 26.2799(7) Å, b = 24.1541(6) Å, c = 29.8839(6) Å, V = 18969.3(8) Å3, and Z = 16. Its structure contains isolated [CoSn9] monocapped square antiprism and [Sn4] tetrahedron in the ratio 1:2, forming a hierarchical variant of Laves phase MgZn2. The structural relation between the title compound with MgZn2 as well as other binary stannides is also discussed. [ABSTRACT FROM AUTHOR]

Abstract: One new AgI complex, [Ag2(aip)(NH3)]n (H2aip = 5-aminoisophthalic acid), has been prepared and structurally and spectroscopically characterized. The title complex crystallizes in the monoclinic system P21/c (no. 14) with a =6.975(2) Å, b =8.756(3) Å, c =16.086(6) Å, β =97.318(4)°, V=974.4(6) Å3 and Z=4. Its structure features a three-dimensional (3D) network composed of two-dimensional (2D) flexuous layer interconnected via weak hydrogen bonds. In aqueous solution, the H2aip exhibits blue emission, while the title complex with tetranuclear silver(I) cores and weak Ag…Ag bonds shows visible intense purple luminescence. [Copyright &y& Elsevier]