Activation of CO2, CS2, and Dehydrogenation of Formic Acid Catalyzed by Iron(II) Hydride Complexes. Issue 33 (21st October 2016)

• Record Type: Journal Article
• Authors: Wang, Lin; Sun, Hongjian; Zuo, Zhenyu; Li, Xiaoyan; Xu, Weiqin; Langer, Robert; Fuhr, Olaf; Fenske, Dieter
• Is Part Of: European journal of inorganic chemistry. Issue 33(2016)
• Page Start: 5205
• Page End: 5214
• Publication Date: 2016-10-21
• Subjects: Iron -- Hydrides -- Carbon dioxide -- Carbon disulfide -- Dehydrogenation; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201600642
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : Fluoroarylimine‐stabilized iron(II) hydrides were used for the activation of CO2 . The resulting iron(II) formate complex6, which was obtained by formal CO2 insertion into the Fe–H bond, turned out to be unstable in solution. CO was suitable for the formation of stable analogues of complex6 . From the three‐component reaction of CO, CO2, and iron hydride, a series of stable carbonyl formate iron(II) complexes7 –9 were generated. Iron(II) formate complex6 could also be obtained from the reaction of the iron(II) hydride complex with formic acid. On the basis of this result, the dehydrogenation of formic acid catalyzed by iron(II) hydrides was explored. The reaction was monitored by in situ 1 H NMR spectroscopy, and a possible mechanism was proposed. In addition, iron(II) hydrides also reacted with CS2 to generate thiocarboxy iron(II) complexes12, 13, 14, and16 . Unexpected complex17 was produced from the three‐component reaction of CS2, complex4, and compound15 . The possible mechanism of the three‐component reaction was also studied by operando IR spectroscopy. Abstract : Fluoroarylimine‐stabilized iron(II) hydrides were used for the activation of CO2 . Iron(II) formate was obtained either by CO2 insertion into the Fe–H bond or from the reaction of iron(II) hydride with formic acid. The dehydrogenation of formic acid was explored with iron hydrides as catalysts. An unexpected product was generated from the reaction of CS2, iron hydride, and an imine.