[M₄Sn₄Se₁₇]^10– Cluster Anions (M = Mn, Zn, Cd) in a Cs⁺ Environment and as Ternary Precursors for Ionothermal Treatment

Investigations on the transformation of selenidostannates in ionic liquids were extended by using ternary P1-type cluster precursors [M₄Sn₄Se₁₇]^10– [M = Mn (1), Zn (2), Cd (3)], which were synthesized for the first time as their Cs⁺ salts. Treatment of 1 with 1,2-diaminoethane (en) in [BMIm]­[BF₄] yielded two-dimensional-layered [Mn­(en)_2.5(en-Me)_0.5]­[Sn₃Se₇] (4; en-Me = H₂NC₂H₄NHCH₃). 1–4 were characterized by single-crystal X-ray diffraction and UV/visible spectroscopy.