A modified method has been developed for the synthesis of the Mo6S8 Cluster unit in one step from Mo6Cl12 via reaction with NaSH and NaOBu in refluxing n-BuOH-pyridine. The ligand-deficient Na2xMo6S8+x(py)y (1) serves as a convenient starting material for the preparation of the amine complexes Mo6S8L6, with L = pyridine (2), pyrrolidine (4), and piperidine (5). Although propylamine readily dissolves the ligand-deficient starting material, only amorphous Mo6S8(PrNH2)6-x (3) could be isolated. However, the latter acts as a facile reactant for the preparation of the other complexes by ligand substitution. Crystallographic data for the complexes are as follows : Mo6S8(py)6.2py (2), cubic, Pa3BAR, a = 16.994(2) angstrom, Z = 4, R = 0.0381, R(w) = 0.0351; Mo6S8(pyrr)6.pyrr (4), tetragonal, I4(1)/a, a = 29.933(4) angstrom, c = 23.697(8) angstrom, Z = 16, R = 0.0675, wR2 = 0.2034; Mo6S8(pip)6.7pip, (5), tetragonal, I4BAR, a = 19.421(2) angstrom, c = 22.584 (3) angstrom, Z = 8, R = 0.0317, R(w) = 0.0366. These complexes all show strong bands in the IR at 380 +/- 5 cm-1 and in the Raman at 414 +/- 4 cm-1, assigned as predominantly Mo-S stretching modes. XP spectra give characteristic binding energies at 227.7 +/- 0.1 (Mo 3d5/2), 230.8 +/- 0.1 (Mo 3d3/2), 225.1 +/- 0.3 (S 2s), 160.6 +/- 0.1 (S 2p3/2), and 161.8 +/- 0.1 (S 2p1/2) eV. Mo-Mo and Mo-S bond distances show little variation among the complexes, with average values of 2.647 and 2.454 angstrom, respectively. The average Mo-N bond distance, 2.297 angstrom, indicates rather weak bonding of these N-donor ligands.