Syntheses of new Fe/Se clusters via the reactions of PhC(Se)NHCH2Ph, Et3N and Fe3(CO)12 with electrophiles
作者:Yao-Cheng Shi、Ying Shi、Wei Yang
DOI:10.1016/j.jorganchem.2014.08.033
日期:2014.12
The selenoamide-based route to synthesize new Fe/Se cluster complexes has been investigated. The three-component reaction of PhC(=Se)NHCH2Ph, Et3N and Fe3(C0)12 affords the [Et3NH1+ salt of the [(ttPhC=NCH2Ph)Fe2(C0)6(11-Se)l- cluster anion. The Se-centered cluster anion reacts with PhCH2Br to give (t1-k2C,N-PhC=NCH2Ph)Fe2(C0)6(tt-SeCH2Ph) (1). Furthermore, trapping the Se-centered cluster anion with PPh2CI offers (11-k2C,N-PhC=NCH2Ph)Fe2(C0)6(tt-k2Se,P-SePPh2) (2). Treating the Se-centered cluster anion with CF3CO2H leads to [(tt-k2C,N-PhC=NCH2Ph)Fe2(C0)612(n4-Se2) (3) and [(tt-k2C,N-PhC NCH2Ph)Fe2(C0)6(n4-Se)12Fe2(C0)6 (4). More interestingly, reacting with Fe3(C0)12 forms the [Et3NH1+ salt of the I( tt-PhC NcH2ph)Fe2(C0)6(114-Se)Fe2(C0)6(1-00)1- cluster anion. Treating the tt-CO-containing cluster anion with (1,2-02C6H4)PCI produces (tt-k2C,N-PhC=NCH2Ph)Fe2(C0)6(!14-Se)Fe2(C0)6(1(1,2-02C6F14)P) (5). All the new cluster complexes have been unequivocally determined by X-ray crystallography and completely characterized by microanalyses, IR, 1H NMR, 13C NMR and 775e NMR as well as 31P NMR for 2 and 5. Therefore, the reactions of PhC(=Se)NHCH2Ph, Et3N and Fe3(C0)12, via the MtPhC=NCH2Ph)Fe2(C0)6(ti-Seli cluster anion, with electrophiles demonstrate an unprecedented route to new Fe/Se cluster complexes. (c) 2014 Elsevier BY. All rights reserved.