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本文报导[(CH_3)_4N]_2K[Mo_2OS_2(NO)_2(S_2)S_5]·H_2O的合成和晶体结构。该化合物晶体属于单斜晶系,所属的空间群为P2_1/c。晶胞参数为:a=13.320(2),b=17.377(2),c=13.269(3),β=107.93(2)°,Z=4。在CAD—4四圆衍射仪上,用MoKα射线收录了3576个独立衍射数据(I≥3σ(I))。晶体结构用直接法解出,经Fourier合成和全矩阵最小二乘方修正,最后偏离因子R=0.045。结构分析表明,晶体中Mo—Mo间距为3.421,二钼原子间未成键。Mo原子周围呈近似五角双锥的七配位构型。本结构的特征在于二Mo原子间除双硫桥外还存在氧桥。
This paper reports the synthesis and crystal structure of [(CH_3) _4N] _2K [Mo_2OS_2 (NO) _2 (S_2) S_5] · H_2O. The crystal belongs to the monoclinic system and belongs to the space group P2_1 / c. The unit cell parameters are: a = 13.320 (2), b = 17.377 (2), c = 13.269 (3), β = 107.93 (2) °, Z = 4. On the CAD-4 four-circle diffractometer, 3576 independent diffraction data (I ≥ 3σ (I)) were recorded with MoKα radiation. The crystal structure is solved by the direct method, corrected by Fourier synthesis and full matrix least squares, with the final deviation factor R = 0.045. The structural analysis shows that the Mo-Mo spacing in the crystal is 3.421, and there is no bond between the two molybdenum atoms. Around the Mo atom is approximately pentagonal bipyramidal seven-coordinate configuration. The structure is characterized by the presence of an oxygen bridge in addition to the disulfide bridge between two Mo atoms.