Abstract
Two new transition-metal thiogermanates [M(dap)3]4Ge4S10Cl4 (M = Co, Ni; dap = 1,2-propanediamine) have been solvothermally synthesized and structurally characterized. The two thiogermanates are isostructural and consist of discrete Ge4S 10 4− adamantane-like ions, free Cl− ions, and [M(dap)3]2+ cations as counterions. The Ge4S 10 4− anion is built from corner-sharing connection of four GeS 4 4− tetrahedra. Although some chalcogenidogermanates have been obtained by use of in situ generated transition-metal complexes as structure-directing agents under mild solvothermal conditions, their anions are usually dimeric [Ge2Q6]4− (Q = S, Se) species. The new thiogermanates are rare examples of adamantane-like (Ge4S 10 4− ) thiogermanates combined with transition-metal complexes. Their optical properties have been investigated by UV–Vis spectra.
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