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Updated: May 30, 2026

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
Published on: November 22, 2016
Bis(1-methyl-piperazine-1,4-diium) tetra-bromidocuprate(II).
1Department of Chemical & Environmental Engineering, Anyang Institute of Technology, Anyang 455000, People's Republic of China.
Researchers synthesized a novel copper bromide compound using 1-methyl-piperazine. This study details its crystal structure and the formation of a 2D network via hydrogen bonds.
Area of Science:
- Inorganic Chemistry
- Crystal Engineering
- Coordination Chemistry
Background:
- Copper(II) bromide complexes exhibit diverse structural motifs.
- Piperazine derivatives are versatile ligands in coordination chemistry.
- Hydrothermal synthesis offers a route to crystalline materials.
Purpose of the Study:
- To synthesize and characterize a new copper(II) bromide compound with 1-methyl-piperazine.
- To investigate the structural features and hydrogen bonding interactions in the synthesized material.
- To explore the formation of extended network structures in coordination compounds.
Main Methods:
- Hydrothermal synthesis of the title compound, (C(5)H(14)N(2))[CuBr(4)], using CuBr(2) and 1-methyl-piperazine in an HBr/water solution.
- Single-crystal X-ray diffraction analysis to determine the crystal structure.
- Analysis of bond distances and hydrogen bonding interactions.
Main Results:
- The title compound, (C(5)H(14)N(2))[CuBr(4)], was successfully synthesized.
- The crystal structure reveals a tetrahedral [CuBr(4)](2-) anion and a protonated 1-methyl-piperazine cation.
- Cu-Br bond lengths range from 2.3809(11) to 2.4131(11) Å.
- Intermolecular N-H⋯Br hydrogen bonds link the cation and anion units into a 2D network parallel to the ab plane.
Conclusions:
- The synthesis yielded a novel copper(II) bromide coordination compound.
- The crystal structure is characterized by tetrahedral copper anions and protonated piperazine cations.
- Hydrogen bonding plays a crucial role in assembling a two-dimensional supramolecular network.
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