Crystal structure and void analysis of tris-(2-amino-1-methyl-benzimidazolium) hexa-kis-(nitrato-κ ,')lanthanate(III).

The organic-inorganic complex salt, (CHN)[La(NO)], comprises a network of N-protonated 2-amino-1-methyl-benzimidazolium cations and hexa-kis-(nitrato)lanthanate(III) anions. The La atom is twelve-coordinate within a distorted icosa-hedral environment. In the unit cell, each pair of the La atoms lie nearly on one of the crystallographic glide planes. In the crystal structure, there are several N-H⋯O hydrogen-bonding inter-actions between the cations and terminal oxygen atoms from the nitrate moieties of the [La(NO)] anion. Additional weak C-H⋯O hydrogen bonds between the cations and anions consolidate the three-dimensional arrangement of the structure. A packing analysis was performed to check the strength of the crystal packing.