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用MoCl_5和C_ 6H_5COOH(或CH_3C6H_4COOH)在氯苯溶液中反应,得到四钼簇合物Mo_4(μ_3-O)_2O_4Cl_2-(OCOC_6H_5)_6(或[Mo_4(μ_3-O)_2O_4Cl_2(OCOC_6H_4CH_3)_6]·2C_6H_5Cl)晶体。用X射线单晶衍射法测定了簇合物的晶体结构,运用18电子规则及簇合物的晶体结构数据,得到金属Mo-Mo键键价为1,钼在簇合物中均呈+5价。进行了反应机理的探讨,簇合物中端基氧和桥基氧的存在来自于苯甲酸(对甲基苯甲酸),MoCl_5和C_6H_5COOH(CH_3C_6H_4COOH)作用时,首先生成钼的含氧配合物MoOCl_3,然后生成双核钼配合物Mo_2(μ_2-O)_2O_2Cl_2,进一步形成配合物。红外光谱、激光拉曼光谱和磁化率的测定证明了结构分析的结果。值得注意的是,固体表面光电压谱和固体光声光谱的测定,簇合物Mo_4(μ_3-O)_2O_4Cl_2(OCOC_6H_5)_6的表面光电压谱在～600nm处有一光致电荷分离谱带。
Mo 4 (μ 3 O) 2 O 4 Cl 2 - (OCOC 6 H 5) 6 (or [Mo 4 (μ 3-O) 2 O 4 Cl 2 (OCOC 6 H 4 CH 3) 6] was obtained by the reaction of MoCl 5 with C 6 H 5 COOH or CH 3 C 6 H 4 COOH in chlorobenzene solution 2C_6H_5Cl) crystals. The crystal structure of the cluster was determined by single crystal X-ray diffraction. The crystal structure of the cluster was determined by the 18-electron rule and the crystal structure data of the cluster. price. The reaction mechanism was discussed. The presence of terminal oxygen and bridged oxygen in the cluster comes from the reaction of benzoic acid (p-methylbenzoic acid), MoCl_5 and C_6H_5COOH (CH_3C_6H_4COOH), and the oxygen-containing complex MoOCl_3 , And then the binuclear molybdenum complex Mo_2 (μ_2-O) _2O_2Cl_2 was formed to further form the complex. Infrared spectroscopy, laser Raman spectroscopy and magnetic susceptibility measurements confirmed the results of the structural analysis. It is worth noting that the surface photovoltage spectrum of the cluster Mo_4 (μ_3-O) _2O_4Cl_2 (OCOC_6H_5) _6 has a photo-induced charge-splitting band at ~600 nm as determined by solid surface photovoltage and solid photoacoustic spectroscopy.