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Updated: Jun 5, 2026

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
Published on: November 22, 2016
Dichloridobis(methyl-amine-κN)boron(III) chloride
Markus Weinmann1, Jürgen Nuss, Martin Jansen
1Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany.
The first crystallographically characterized di(alkyl-amine)-boron dichloride salt features a boron atom with tetrahedral coordination. This structure exhibits N-H⋯Cl hydrogen bonds, forming a layered arrangement in the crystal lattice.
Area of Science:
- Inorganic Chemistry
- Crystallography
- Materials Science
Background:
- Boron-nitrogen compounds are crucial in various chemical applications.
- Characterization of novel boron complexes expands our understanding of chemical bonding and structure.
- Di(alkyl-amine)-BCl(2)(+) salts represent an under-explored class of inorganic compounds.
Purpose of the Study:
- To synthesize and characterize the first crystallographically defined di(alkyl-amine)-BCl(2)(+) salt.
- To elucidate the coordination environment around the boron atom.
- To investigate the intermolecular interactions and crystal packing of the novel salt.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the precise atomic arrangement.
- Spectroscopic techniques were used for compound identification and purity assessment.
- Computational methods may be used for further analysis of electronic structure and bonding.
Main Results:
- The title compound, [BCl(2)(CH(3)NH(2))(2)](+)·Cl(-), was successfully synthesized and structurally characterized.
- The boron atom adopts a tetrahedral geometry, coordinated by two chloride ions and two nitrogen atoms from methyl-amine ligands.
- Analysis revealed significant N-H⋯Cl hydrogen bonding interactions between cations and anions, leading to a distinct layered crystal structure.
Conclusions:
- This study reports the first crystallographic characterization of a di(alkyl-amine)-BCl(2)(+) salt.
- The tetrahedral coordination and hydrogen-bonding network provide insights into the structural diversity of boron-containing compounds.
- The findings contribute to the fundamental understanding of inorganic salt structures and potential applications in materials science.
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