Crystal structures of two novel iron isocyanides from the reaction of 2,6-di-methyl-phenyl isocyanide, CNXyl, with bis-(anthracene)ferrate(-1).

ABSTRACT: The reaction of the [K(18-crown-6)(thf)₂]¹⁺ (thf is tetra-hydro-furan) salt of bis-(anthracene)ferrate(-1), or [Fe(C₁₄H₁₀)₂]^-, with 2,6-di-methyl-phenyl isocyan-ide (CNX-yl) in thf resulted in the formation of two new iron isocyanide complexes, namely, [(1,2,3,4-η)-anthracene]tris-(2,6-di-methyl-phenyl isocyanide)iron, [Fe(C₁₄H₁₀)(C₉H₉N)₃] or [Fe(1,2,3,4-η-C₁₄H₁₀)(CNX-yl)₃], and {5,6-bis-(2,6-di-methyl-anilino)-3-(2,6-di-methyl-phen-yl)-1,2,7-tris-[(2,6-di-methyl-phen-yl)imino]-3-azoniahept-3-ene-1,4,7-triido}tris-(2,6-di-methyl-phenyl isocyanide)iron tetra-hydro-furan disolvate, [Fe(C₅₄H₅₆N₆)(C₉H₉N)₃]·2C₄H₈O or [Fe(C₅₄H₅₆N₆)(CNX-yl)₃]·2C₄H₈O, which were characterized by single-crystal X-ray diffraction. The former is likely an inter-mediate along the path to the known homoleptic [Fe(CNX-yl)₅], while the latter contains a tridentate ligand that is formed from the 'coupling' of six CNXyl ligands. A third crystal structure from this reaction, (7-methyl-indol-1-ido-κN)(1,4,7,10,13,16-hexa-oxa-cyclo-octa-decane-κ⁶ O)potassium, [K(C₉H₈N)(C₁₂H₂₄O₆)] or [K(C₉H₈N)(18-crown-6)], contains a 7-methyl-indol-1-ide anion, in which one CNXyl ligand has shed a proton during its reductive cyclization.

SUBMITTER: Brennessel WW 

PROVIDER: S-EPMC8739210 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature