Abstract
The asymmetric unit of the title structure, C3H11NOP+·I−·C3H10NOP, consists of one (dimethylphosphoryl)methanamine (dpma) molecule, one (dimethylphosphoryl)methanaminium (dpmaH) ion and one iodide counter-anion. In the crystal, medium–strong to weak N—H⋯O and N—H⋯N hydrogen bonds connect dpmaH cations and dpma molecules into strands along [001]. The iodide counter-anions form only very weak hydrogen bonds. The crystal used for the diffraction study was found to be an inversion twin with a ratio of 0.83 (2):0.17 (2). The title structure is isotypic to that of dpmaH[ClO4]·dpma [Buhl et al. (2013 ▶). Crystals 3, 350–362].
Highlights
Institut für Anorganische Chemie und Strukturchemie, Lehrstuhl II: Material- und Strukturforschung, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, D40225 Düsseldorf, Germany
Diffraction, 2009), based on expressions derived by Clark &
H atoms treated by a mixture of independent and constrained refinement max = 0.32 e Å3
Summary
H atoms treated by a mixture of independent and constrained refinement max = 0.32 e Å3. Absolute structure: Refined as an inversion twin. R factor = 0.016; wR factor = 0.033; data-to-parameter ratio = 21.1. The asymmetric unit of the title structure, C3H11NOP+IC3H10NOP, consists of one (dimethylphosphoryl)methanamine (dpma) molecule, one (dimethylphosphoryl)methanaminium (dpmaH) ion and one iodide counter-anion. H O and N—H N hydrogen bonds connect dpmaH cations and dpma molecules into strands along [001]. The iodide counter-anions form only very weak hydrogen bonds. The crystal used for the diffraction study was found to be an inversion twin with a ratio of 0.83 (2):0.17 (2). The title structure is isotypic to that of dpmaH[ClO4]dpma [Buhl et al
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