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本文合成了新型混合价态双核钴化合物Co(Ⅰ)Co(Ⅱ)(μ-Ph_2Ppy)_2(μ-CO)_2Cl_3[Ph_2Ppy为2-(二苯基膦基)吡啶],并对其分子结构进行了测定,收集到了三维独立的衍射点3569个,晶体空间群为P2_1nb。晶胞参数a=13.32(1),b=14.31(1),c=18.94(2),Z=4。用直接法解出结构,用全矩阵最小二乘法进行结构精修,最终的R值为0.072。结构特征是:不考虑Co—Co键的情况下,一个钻原子是五配位变形三角双锥构型,形式氧化态为+1。另一个钻原子是六配位变形八面体构型,形式氧化态为+2。Co—Co键距为2.685(1)。该分子属C-(2v)点群。该分子进一步还原可得到具有w-框架结构的新混合价态化合物Co(0)Co(Ⅰ)(μ-Ph_2Ppy)_2(μ-CO)(CO)Cl。
In this paper, a novel mixed valence binuclear cobalt compound Co (Ⅰ) Co (Ⅱ) (μ-Ph_2Ppy) _2 (μ-CO) _2Cl_3 [Ph_2Ppy is 2- (diphenylphosphino) The measurements were made and 3569 3D-independent diffraction points were collected. The crystal space group P2_1nb. Cell parameters a = 13.32 (1), b = 14.31 (1), c = 18.94 (2), Z = 4. The structure was solved by direct method and the structure was refined by full matrix least square method. The final R value was 0.072. Structural features are: Without considering the Co-Co bond, a diamond atom is a five-coordinate deformed triangular bipyramid configuration with a formal oxidation state of +1. The other diamond atom is a six-coordinated distorted octahedral configuration with a formal oxidation state of +2. The Co-Co bond distance is 2.685 (1). The molecule is a C (2v) point cloud. The further reduction of the molecule gives the new mixed valence compound Co (0) Co (I) (μ-Ph 2 Py) _2 (μ-CO) (CO) Cl with a w-framework structure.