N-allylaldiminium cation as π-ligand: Synthesis and crystal structure of [(CH3)2N-C6H4-CH=NH-CH 2-CH=CH2]CuX2 (X = Cl, Br) compounds
(1999) Russian Journal of Coordination Chemistry — Vol. 25, n° 6, p. 438-444 (1999)
Files
No attached file found for this publication.
Details
- Authors
- Abstract
- The [(CH3)2N-C6H4-CH=NH-CH 2-CH=CH2]CuX2 [X = Cl (I) or Br (II)] complexes were prepared by ac electrochemical synthesis from N-allyl-4-(N′,N′-dimethylamino)benzaldimine (ADBA) and ethanol solution of CuCl2 · 2H2O or CuBr2, respectively, and their crystal structures were determined [DARCh diffractometer, MoKα radiation, 989 (F ≥ 4σ(F)) and 965 (F ≥ 3σ(F)) reflections, R = 0.035 and 0.053 for I and II, respectively]. The compounds are isostructural, space group P21/a, Z = 4. Unit cell parameters are a = 27.74(1), b = 7.253(3), c = 6.852(6) Å, β= 91.05(5)° for I and a = 28.175(8), b = 7.392(2), c = 7.000(2) Å, β = 90.18(3)° for II. The copper coordination polyhedron is a trigonal pyramid formed by three halogen atoms and a C=C bond. The structure is built from the centrosymmetric Cu2X4(ADBAH)2 dimers joined together by the hydrogen bonds C-H...X [H⋯Cl 2.85-2.87(8) Å]. The geometry of the ADBAH+ cation is indicative of its partial transformation from the aromatic to quinoid form, owing to the stabilization of the aldiminium cation under the +M-effect of the (CH3)2N group. Net atomic charges are calculated for I. © 1999 MAEe cyrillic signK "Hayκa/Interperiodica".
- Affiliations
Citations
Filinchuk, Y., & Mys’kiv, M. G. (1999). N-allylaldiminium cation as π-ligand: Synthesis and crystal structure of [(CH3)2N-C6H4-CH=NH-CH 2-CH=CH2]CuX2 (X = Cl, Br) compounds. Russian Journal of Coordination Chemistry, 25(6), 438-444. https://hdl.handle.net/2078.5/84919 (Original work published 1999)