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(davaH 2 )[FeCl 4 ] 2  crystallizes at room temperature from aqueous solutions of 2,4-diaminovinamidinium hydrochloride, (davaH)Cl, and FeCl 3  in 3M HCl in the orthorhombic space group Pca2 1  with a=14.108(3), b = 16.502(3), c = 18.919(4) Å, Z=8. The structure consists of diprotonated tricyclic (davaH 2 ) 2+  cations and slightly distorted tetrahedral [FeCl 4 ] -  anions. The cations are bent around the central heptacycle forming boat-like units. One of the two independent cations is disordered between two positions. Some interatomic distances N···Cl are interpreted in terms of N-H···Cl hydrogen bonds.

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Die Kristallstruktur von 2,4-Diaminovinamidinium-bis-tetrachloroferrat(III), (C 9 H 16 N 4 ) [FeCl 4 ] 2  /  The Crystal Structure of 2,4-Diaminovinamidinium Bis-tetrachloroferrate(III), (C 9 H 16 N 4 )[FeCl 4 ]