Investigations of the copper bromide-ethylenediamine system: The hydrothermal synthesis and X-ray crystal structure of [Cu(H2NCH2CH2NH2)2] [{Cu2Br4}] and [Cu(H2NCH2CH2NH2)2] [{Cu5Br7}]

Robert P. Hammond, Douglas J. Chesnut, Jon A Zubieta

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The hydrothermal reactions of CuBr2, CuBr, and ethylenediamine have resulted in the synthesis of two new compounds. [Cu(H2NCH2CH2NH2)2] [{Cu2Br4}] has a two-dimensional sheet structure while [Cu(H2NCH2CH2NH2)2] [{Cu5Br7}] crystallizes as a three-dimensional network. Both compounds were characterized by single-crystal X-ray diffraction. The following are the crystal data for [Cu(H2NCH2CH2NH2)2] [{Cu2Br4}] (1), triclinic space group P1 (No. 1) with a=6.491(1) Å, b=8.012(2) Å, c=8.070(2) Å, α=107.713(5)°, β=109.976(4)°, γ=96.815(4)°, Z=1, dcalc=2.88 gcm-3, and wR2 (R1)=0.093(0.037), and [Cu(H2NCH2CH2NH2)2] [{Cu5Br7}] (2), orthorhombic space group Pnma (NO. 62), with a=12.886(4) Å, b=16.776(5) Å, c=9.170(3) Å, Z=4, dcalc=3.55 gcm-3, and wR2 (R1)=0.099 (0.073). Both structures consist of anionic one-dimensional copper(I) bromide chains interspersed with cationic [Cu(H2NCH2CH2NH2)2] 2+ units.

Original languageEnglish (US)
Pages (from-to)55-60
Number of pages6
JournalJournal of Solid State Chemistry
Issue number1
StatePublished - 2001



  • Hydrothermal synthesis
  • X-ray crystal structure

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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