71699-78-0Relevant academic research and scientific papers
Spectroscopic and structural investigation on the trihalocuprates(II) of the 4-benzylpiperidinium cation. Crystal and molecular structure of bis(4-benzylpiperidinium) hexachlorodicuprate(II)
Battaglia,Corradi, A. Bonamartini,Marcotrigiano,Menabue,Pellacani
, p. 125 - 129 (2008/10/08)
Some compounds of the type (4BzpipdH)2Cu2XmY6-m (X = Cl; Y = Br; m = 6, 4, 2, 0; 4BzpipdH = 4-benzylpiperidinium cation) and (4BzpipdH)2CuBr4 complexes were prepared and characterized by means of X-ray powder, electronic, and infrared spectra and magnetic moments. For one of them, (4BzpipdH)2Cu2Cl6, the crystal structure was also determined. The crystals are monoclinic, of space group C2/c, with a = 28.877 (8) ?, b = 8.440 (2) ?, c = 12.023 (2) ?, β = 101.9 (1)°, Z = 4, dcalcd = 1.60 g cm-3, and dmeasd = 1.61 g cm-3. The structure, solved by the heavy-atom method and refined by least-squares calculations to a R = 3.1%, consists of 4-benzylpiperidinium cations and Cu2Cl62- groups, weakly joined into infinite chains by Cu-Cl interaction (2.687 (3) ?). The copper atoms are five-coordinate with an average distance of 2.262 ? for the four shorter Cu-Cl bonds and a geometry intermediate between trigonal bipyramidal and tetragonal pyramidal. The magnetic and spectroscopic results for the (4BzpipdH)2Cu2XmY6-m complexes indicate that they are isomorphous and isostructural, while those for the (4BzpipdH)2CuBr4 complex suggest a distorted tetrahedral symmetry. Hydrogen bonding interactions greater in the former than in the latter complexes are also evident from the infrared spectra.
