Constructor Graphs as Useful Tools for the Classification of Hydrogen Bonded Solids: The Case Study of the Cationic (Dimethylphosphoryl)methanaminium (dpmaH+) Tecton

Crystals

Guido J. Reiss¹ 

[1] Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Düsseldorf 40225, Germany

关键词: hydrogen bonding;    constructor graph;    crystal engineering;    pattern analysis;    phosphoryl compounds;   

DOI  :  10.3390/cryst6010006

来源: mdpi

【 摘 要 】

The structural chemistry of a series of dpmaH (dpmaH = (dimethylphosphoryl)methanaminium) salts has been investigated using constructor graph representations to visualize structural dependencies, covering the majority of known dpmaH salts. It is shown that the structurally related α-aminomethylphosphinic acid can be integrated in the systematology of the dpmaH salts. Those dpmaH salts with counter anions that are weak hydrogen bond acceptors (ClO₄⁻, SnCl₆²⁻, IrCl₆²⁻,I⁻) tend to form head-to-tail hydrogen bonded moieties purely consisting of dpmaH⁺ cations as the primarily structural motif. In structures with weak to very weak hydrogen bonds between the dpmaH⁺ cations and the counter anions, the anions fill the gaps in the structures. In salts with medium to strong hydrogen bond acceptor counter ions (Cl⁻, NO₃⁻, PdCl₄²⁻), the predominant structural motif is a double head-to-tail hydrogen bonded (dpmaH⁺)₂ dimer. These dimeric units form further NH···X hydrogen bonds to neighboring counter anions X, which results in one-dimensional and two-dimensional architectures.

【 授权许可】

CC BY   
© 2015 by the author; licensee MDPI, Basel, Switzerland.