Abstract
The crystal structure of the title salt, [Fe(C5H5)(C8H13N)](HC2O4), consists of discrete (ferrocenylmeth-yl)di-methyl-ammonium cations and hydrogen oxalate anions. The anions are connected through a strong O-H⋯O hydrogen bond, forming linear chains running parallel to [100]. The cations are linked to the anions through bifurcated N-H⋯(O,O') hydrogen bonds. Weak C-H⋯π inter-actions between neighbouring ferrocenyl moieties are also observed.
Highlights
The crystal structure of the title salt, [Fe(C5H5)(C8H13N)](HC2O4), consists of discretedimethylammonium cations and hydrogen oxalate anions
The anions are connected through a strong O—H O hydrogen bond, forming linear chains running parallel to [100]
Our group has been working on the interactions between alkylammonium ions with oxalic acid, and we have recently reported the crystal structure of (H3C)2NH+HC2O40.5H2C2O4 (Diallo et al, 2015)
Summary
Our group has been working on the interactions between alkylammonium ions with oxalic acid, and we have recently reported the crystal structure of (H3C)2NH+HC2O40.5H2C2O4 (Diallo et al, 2015). Braga et al have reported several structures of columnar metallocenium sandwich compounds interacting with hydrogen oxalate (Braga et al, 2002). None of these structures features the hydrogen oxalate anion alone. It is crystallized either with neutral oxalic acid and/or a water molecule. The crystal structure of the title salt, [Fe(C5H5)(C8H13N)]+[HC2O4], (I), features only the hydrogen oxalate anion. This compound was obtained when studying the interaction of (ferrocenylmethyl)dimethylamine and oxalic acid in aqueous solution
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