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The synthesis and crystal structure of two trinuclear molybdenum clusters containing a loosecoordination site, {Mo_3(μ_3-S)(μ-S)_3[S_2P(OEt)_2]_4(C_3H_3ON)}· CH_3CN (Ⅰ) and {Mo_3(μ_3- O)-(μ- S)_3[S_2P(OEt)_2]_4(C_3H_3ON)} (Ⅱ), are reported. Cluster (Ⅰ) belongs to the monoclinic spacegroup p2_1/n, a = 16.579 (3), b = 16.959 (2), c = 16.867 (2) A, β= 94.44 (1)°, V = 4728A~3,Z = 4, D_c = 1.778g·cm~(-3). The crystal structure was solved by the Patterson method with afina1 R value of 0.045. Cluster (Ⅱ) belongs to the triclinic space group Pi, a = 13.175 (4),b = 13.372(6), c = 16.656(3)A, α= 117.87(4), β= 60.09(3), γ= 109.03(3)°, ν= 2231A~3,Z = 2, D_3 = 1.798g·cm~(-3). Direct methods were used to solve the crystal structure with afinal R value of 0.066. Both clusters are monocapped trinuclear ones having an oxazoleoccupied coordination site as their main structural characteristic. The difference in cappingatoms results in the difference in their skeletons, Mo_S_4 in cluster (Ⅰ) vs. Mo_3OS_3
The synthesis and crystal structure of two trinuclear molybdenum clusters containing a loosecoordination site, {Mo_3 (μ_3-S) (μ_ S) _3 [S_2P (OEt) _2] _4 (C_3H_3ON)} · CH_3CN (Ⅰ) and {Mo_3 (Ⅱ), are reported. Cluster (Ⅰ) belongs to the monoclinic space group p2_1 / n, a = 16.579 (3), b = 16.959 (2), c = 16.867 (2) A, β = 94.44 (1) °, V = 4728A ~ 3, Z = 4 and D_c = 1.778g · cm -3 (4), b = 13.372 (6), c = 16.656 (3) A, α = 117.87 (4) The Patterson method with afina1 R value of 0.045. , β = 60.09 (3), γ = 109.03 (3) °, ν = 2231A~3, Z = 2, D_3 = 1.798g · cm -3. Direct methods were used to solve the crystal structure with afinal R value of 0.066. Both clusters are monocapped trinuclear ones having an oxazoleoccupied coordination site as their main structural characteristic. The difference in cappingatoms results in the difference in their skeletons, Mo_S_4 in clu ster (Ⅰ) vs. Mo_3OS_3