Synthesis and Structure of Ionic Copper(I) π-Complexes with Propargylammonium Chloride and Bromide [HC≡CCH2NH3]CuX2
(2001) Russian Journal of Inorganic Chemistry — Vol. 46, n° 7, p. 987-992 (2001)
Files
No attached file found for this publication.
Details
- Authors
- Abstract
- The crystals of [HC≡CCH2NH3]CuX2 (X = Cl (I), Br (II)) were prepared by alternating-current electrosynthesis and characterized by X-ray crystallography and IR spectroscopy. Complex I crystallizes in space group Pcab, a = 19.010(6) Å, b = 7.404(5) Å, c = 8.690(3) Å, V = 1223.1(10) Å3, Z = 8. The structure of II is described by space group P21/b, a = 10.047(1) Å, b = 7.673(1) Å, c = 8.971(1) Å, γ= 103.04(2)°, V = 673.75(13) Å3, Z = 4. The structure of I consists of discrete units of the above-indicated composition, the copper atom forming a planar trigonal environment. In II, similar structural units are combined through the elongated Cu-Br distance (2.910(1) Å) to give chains along the [010] direction. The complexes differ in the efficiency of π-bonding; the Cu-(midpoint of the C≡C bond) distance and the C≡C bond length are 1.923(9), 1.23(1) Å and 1.960(6), 1.192(8) Å for I and II, respectively. The v(C≡C) frequencies in I and II are 157 and 137 cm-1 lower than the corresponding values for the free ligand. The decrease in the v(Csp-H) values by 92 and 84 cm-1 attests to the activation of the ≡C-H bond.
- Affiliations
Citations
Filinchuk, Y., Mykhalichko, B. M., & Davydov, V. N. (2001). Synthesis and Structure of Ionic Copper(I) π-Complexes with Propargylammonium Chloride and Bromide [HC≡CCH2NH3]CuX2. Russian Journal of Inorganic Chemistry, 46(7), 987-992. https://hdl.handle.net/2078.5/84115 (Original work published 2001)