Isolation and Reactivity of Tetrylene‐Tetrylone‐Iron Complexes Supported by Bis(<i>N</i>‐Heterocyclic Imine) Ligands
Xuan‐Xuan Zhao, Tibor Szilvási, Franziska Hanusch, John A. Kelly, Shiori Fujimori, Shigeyoshi Inoue
Abstract
Abstract The germanium iron carbonyl complex 3 was prepared by the reaction of dimeric chloro(imino)germylene [IPrNGeCl] 2 (IPrN=bis(2,6‐diisopropylphenyl)imidazolin‐2‐iminato) with one equivalent of Collman's reagent (Na 2 Fe(CO) 4 ) at room temperature. Similarly, the reaction of chloro(imino)stannylene [IPrNSnCl] 2 with Na 2 Fe(CO) 4 (1 equiv) resulted in the Fe(CO) 4 ‐bridged bis(stannylene) complex 4 . We observed reversible formation of bis(tetrylene) and tetrylene‐tetrylone character in complexes 3 vs. 5 and 4 vs. 6 , which was supported by DFT calculations. Moreover, the Li/Sn/Fe trimetallic complex 12 has been isolated from the reaction of [IPrNSnCl] 2 with cyclopentadienyl iron dicarbonyl anion. The computational analysis further rationalizes the reduction pathway from these chlorotetrylenes to the corresponding complexes.