Abstract: | For the first time aqua pentafluoro manganate(III) compounds with different organic N-cations have been prepared and their crystal structures have been determined: N,N′-DMenH2[MnF5(H2O)] · H2O 1 (N,N′-DMen = N,N′-Dimethylethylenediamine), space group P21/c, a = 916.0, b = 1004.8, c = 1247.9 pm, β = 106.03°, R = 0.035; NMpipzH2 · [MnF5(H2O)] · H2O 2 (NMpipz = N-Methylpiperazine), space group P21/n, a = 757.7, b = 1261.9, c = 1197.1 pm, β = 105.09°, R = 0.027; N,N′-DMpipzH2[MnF5(H2O)] · 2 HF 3 (N,N′-DMpipz = N,N′-Dimethylpiperazine), space group P1, a = 677.1, b = 863.9, c = 1187.7 pm, α = 79.18°, β = 81.63° γ = 67.62°, R = 0.026; and N,N-DMenH2[MnF5(H2O)] · 1/2 HF 4 (N,N-DMen = N,N-Dimethylethylenediamine), space group P1, a = 859.3, b = 1086.5, c = 1092.0 pm, α = 86.96°, β = 78.52° γ = 89.01°, R = 0.035. In all compounds the [MnF5(H2O)]2– octahedra are connected via H-bonds forming 3 D and 2 D network arrangements. The anions are strongly elongated by the Jahn-Teller effect. The FTIR spectra are presented. |