Synthesis and Structure of Compound [C(NH2)3]2{[MoO(H2O)C2O4]2(μ-O)2}·2H2O

Abstract

Abstract: A new compound [C(NH₂)₃]₂{[MoO(H₂O)C₂O₄]₂(μ-O)₂}·2H₂O has been prepared and its crystal structure has been determined by X-ray diffraction analysis. This compound consists of two edge-shared molybdenum-oxygen octahedra and all the Mo atoms are of charge +5. Mo centers are chelated by oxalates. Carbamidines [C(NH₂)₃]⁺ act as counter cations and take part in the construction of hydrogen bonds network. The crystal is monoclinic, space group P2₁/c, a=0.7956(2)nm, b=1.8996(4)nm, c=1.2832(3)nm, β=106.78(3)^o, V=1.8568(7)nm³, R₁=0.0243, ωR₂=0.0672.

Key words: molybdenum, binuclear, crystal structure, hydrogen bond

摘要： 合成并用元素分析和单晶X射线衍射表征了一个新的化合物[C(NH₂)₃]₂{[MoO(H₂O)C₂O₄]₂(μ-O)₂}·2H₂O，测定结果表明该化合物中存在金属Mo-Mo键，通过计算知道钼原子是+5价的，两个钼氧八面体是共边连接的，每个钼上有一个螯合的草酸根，而胍作为阳离子存在于晶体中，参与构筑有特色的氢键网络。该化合物属单斜晶系，空间群P2₁/c, a=0.7956(2)nm, b=1.8996(4)nm, c=1.2832(3)nm, β=106.78(3)^o, V=1.8568(7)nm³, R₁=0.0243, ωR₂=0.0672.

关键词: 钼, 双核, 晶体结构, 氢键

CLC Number:

O614.612

LI Qi,LIU Guang,ZHANG Shiwei. Synthesis and Structure of Compound [C(NH₂)₃]₂{[MoO(H₂O)C₂O₄]₂(μ-O)₂}·2H₂O[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

李琦, 刘广, 章士伟. [C(NH₂)₃]₂{[MoO(H₂O)C₂O₄]₂(μ-O)₂}·2H₂O的合成与结构[J]. 北京大学学报（自然科学版）.

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https://xbna.pku.edu.cn/EN/Y2003/V39/I2/171

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Synthesis and Structure of Compound [C(NH₂)₃]₂{[MoO(H₂O)C₂O₄]₂(μ-O)₂}·2H₂O

[C(NH₂)₃]₂{[MoO(H₂O)C₂O₄]₂(μ-O)₂}·2H₂O的合成与结构

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