A dark solid was obtained by the solid state reaction of (NH4)2MoS4, CuBr and [C16H33)C5H5NBr.H2O. The solid was treated with CH2Cl2 and then diffused with CH3OH to produce the yellow single crystal [C5H5N(C16H33)]]4[Cu4Br8]. The crystal is triclinic with a = 0.9762(2) nm, ...