Synthesis, characterization and electrocatalytic H2 production of phosphine-substituted CpFe complexes
作者:Jin-Ping Li、Su-Ping Luo、Shu-Zhong Zhan、Yao-Cheng Shi
DOI:10.1016/j.poly.2018.06.009
日期:2018.9
Reaction of Ph2P(Se)CSNHPh with Cp2Fe2(CO)(4) in refluxing toluene affords complexes CpFe(CO)(k(2)P,S-Ph2PC(S)=NPh) (1) and CpFe(CO)(2)(kP-P(=Se)Ph-2) (2). Further, reactions of 2 with 1 equiv of PPh2R in the presence of Me3NO generate complexes CpFe(CO)(kSe-SeP(=Se)Ph-2)(L) (3, L = PPh3; 4, L = PPh2Py). Unlike 2, reactions of CpFe(CO)(2)(kP-P(=S)Ph-2) with PPh2R under the same conditions give the corresponding phosphine-substituted complexes CpFe(CO)(kp-p(=S)Ph-2)(L) (5, L= PPh3; 6, L = PPh2Py). All the new compounds have been characterized by elemental analyses, IR, H-1 NMR, C-13 NMR and P-31 NMR spectroscopy and structurally determined by X-ray crystallography. Electrochemical studies indicate that using HOAc or TFA as a proton source complexes 1-6 can catalyze H-2 evolution. (C) 2018 Published by Elsevier Ltd.