Synthesis, Characterization and Structure of a New Partially-sulfided Ni-Mo Dimetallic Complex and Its Evaluation as a Catalyst Precursor for Dibenzothiophene Hydrodesulfurization

摘要

A new complex,[Ni(H2O)6][Mo2O2S2(edta)]·2H2O(1,edta = ethylenediaminetetraacetate),which was partially-sulfided,was synthesized and characterized by single-crystal X-ray diffraction.Compound 1 belongs to the monoclinic system,C2/c space group with α = 7.1844(2),b= 12.5626(4),c = 27.0201(8) A,β= 93.066(3)°,V= 2435.21(14) A3,C10H28S2Mo2N2NiO18,Mr =779.02,Dc= 2.1247 g/cm3,μ(MoKα) = 2.035 mm-1,F(000) = 1550,Z = 4,the final R = 0.0366 and wR = 0.0656 for 5359 observed reflections(I>2σ(Ⅰ)).There are one isolated[Ni(H2O)6]2+ cation and one[Mo2O2S2(edta)]2- anion in its asymmetric unit,and they are connected through multiple hydrogen bonds to generate a 3D network.In addition,the thermal behavior of compound 1 and the hydrodesulfurization activity of the catalyst derived from compound 1 were studied.