Crystal structure of ferrocenylmethyl(dimethyl)ammonium tetrachlorozincate monohydrate

Abstract

Crystals of ferrocenylmethyl(dimethyl)ammonium tetrachlorozincate monohydrate, [C₅H₅FeC₅H₄·CH₂·NHMe₂⁺]₂ ZnCl₄^2–, H₂O are monoclinic, a= 18·076(6), b= 14·038(5), c= 12·246(5)Å, β= 95·70(1)°, Z= 4, space group P2₁/c. The structure was determined with Mo-K_α scintillation counter data by direct methods, and was refined by least-squares procedures, the final R being 0·068 for 2012 observed reflexions. The mean bond distances are Fe–C 2·04 and C–C (cyclopentadienyl rings) 1·43 Å. Groups of four cations, two anions, and two water molecules (two formula units) are linked around centres of symmetry by N–H ⋯ Cl (3·11 Å), N–H ⋯ O (2·76 Å), and O–H ⋯ Cl (3·05, 3·17 Å) hydrogen bonds.