Hemiprotonated Dafone, a New Cationic Species. the Novel Di-dafonium Iron(III) Complex: [(Dafone)₂H]⁺[FeCl₄]⁻
The reaction of dafone (4,5-diazafluoren-9-one, 1) and iron(III) chloride in concentrated hydrochloric acid medium yields an unusual complex containing hemiprotonated dafone, [(dafone)2H]+[FeCl4]-. The crystal structure reveals that two coordinating ligands share a single proton to form the new cation [(dafone)2H]+ while the accompanying tetrachloroferrate(III) anion stabilizes the ion pair. The [FeCl4]- anion is close to tetrahedral in geometry with four chloro ligands in the first coordination sphere which is only slightly affected by the interactions with the di-dafonium unit. © 2003 Elsevier Science B.V. All rights reserved.
P. Kulkarni et al., "Hemiprotonated Dafone, a New Cationic Species. the Novel Di-dafonium Iron(III) Complex: [(Dafone)₂H]⁺[FeCl₄]⁻," Inorganic Chemistry Communications, Elsevier, Jan 2003.
The definitive version is available at https://doi.org/10.1016/S1387-7003(03)00171-0
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© 2003 Elsevier, All rights reserved.