Synthesis and crystal structure of copper complexes with N,N,N,N',N' – pentaallylethylenediammonium: [(C₃H₅)₃NC₂H₄N(H⁺)(C₃H₅)₂]Cu^IICl₄ and [(C₃H₅)₃NC₂H₄N(H⁺)(C₃H₅)₂]Cu^IBr₃

Chem. Met. Alloys 2 (2009) 138-145

https://doi.org/10.30970/cma2.0103

Mykhaylo MONCHAK, Evgeny GORESHNIK, Volodymyr DAVYDOV, Maryan MYS’KIV

N,N,N,N',N'-pentaallylethylenediammonium has been obtained by reaction of ethylenediamine and allyl bromide in benzene +ethanol (1:5) medium in the presence of NaHCO₃. After 48 hours of mixing and boiling the mixture was filtered. Good quality crystals of the complexes [(C₃H₅)₃NC₂H₄N(H⁺)(C₃H₅)₂]Cu^IICl₄ (I) and [(C₃H₅)₃NC₂H₄N(H⁺)(C₃H₅)₂]Cu^IBr₃ (II) were obtained using the alternating-current electrochemical technique and then X-ray investigated. The crystal structures of I and II are monoclinic, for I: space group P2₁, a = 7.596(2), b = 18.302(6), c = 8.271(3) Å, β = 103.80(2)°, V = 1116.7(6) Å³, Z = 2; for II: space group P2₁/c, a = 8.328(1), b = 18.377(3), c = 13.854(2) Å, β = 95.31(1)°, V = 2111.1(5) Å³, Z = 4. In both structures simple (CuCl₄^2– and CuBr₃^2– respectively) anions occur. Due to the absence of π-interaction in I and II the organic and inorganic moieties are held together by electrostatic interaction and E–H…X (E = N, C; X = Cl, Br) bonds.

Fragment of I crystal structure

Keywords

Copper complexes / Ethylenediamine / N,N,N,N',N'-pentaallylethylenediammonium bromide / Isolated inorganic anions