Bis[4-(dimethylamino)pyridinium] octaaquachloridolanthanum(III) tetrachloride trihydrate

Abstract

The title organic–inorganic salt, (C7H11N2)2[LaCl(H2O)8]Cl4·3H2O, consists of two 4-(dimethyl­amino)­pyridinium and one [La(H2O)8Cl]2+ cations, four chloride anions and three solvent water mol­ecules. In the crystal, the various units are connected by N—H⋯Cl, O—H⋯Cl, O—H⋯O and N—H⋯O hydrogen bonds, forming a network of alternating organic and inorganic layers. The 4-(dimethyl­amino)­pyridinium cations stack along the c axis, while the inorganic layers lie parallel to the ac plane. The chloride anions are located between these entities, forming hydrogen bonds with the NH atom of the pyridinium ions and the water mol­ecules. There are also C—H⋯Cl hydrogen bonds present involving one of the 4-(dimethyl­amino)­pyridinium cations, resulting in the formation of a three-dimensional supra­molecular architecture.

4-(Dimethylamino)pyridinium octaaquaerbium(III) tetrachloride monohydrate

“…Cl 4 . 3H 2 O (I) (Benslimane et al, 2012a) and (C 7 H 10 N 2 ) 3 . [Nd 2 Cl 4 (H 2 O) 10 ].Cl 5 .2H 2 O (II) (Benslimane et al, 2012b).…”

Tris[4-(dimethylamino)pyridinium][(bis-μ-dichlorido)-decaaquadichloridodineodymium(III)] pentachloride dihydrate

“…For the crystal structures of complexes involving 4-(dimethylamino)pyridinium, see: Chao et al (1977); Mayr-Stein & Bolte (2000); Lo & Ng (2008, 2009; Koon et al (2009); Benslimane et al (2012). For hydrogen-bond motifs, see: Bernstein et al (1995).…”

“…The first group involves hydrogen bonds linking atom Cl11 with two organic cations via the pyridinium N12-H12 H atom (Table 1), generating centrosymmetric R 2 2 (4) motifs (Bernstein et al, 1995) at y = 1/2, and this arrangement is analogous to that seen in (C 7 H 10 N 2 ) 2[ LaCl(H 2 O) 8] Cl 4 . 3H 2 O (Benslimane et al, 2012). The second type of hydrogen bond, in which the Clanion is the acceptor, is a linkage between the (free and coordinated) water molecules and the Clanion which enlcose R 2 4 (12) ring motifs along direction [001] ( Table. 1).…”