caa a22 4500 463239881 CHVBK 20180405153309.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10947-007-0117-6 doi (NATIONALLICENCE)springer-10.1007/s10947-007-0117-6 Low-temperature complexes of europium atoms and dimers with cyanophenylpyridines and alkylcyanophenylpyridines [Elektronische Daten] [T. Shabatina, A. Vlasov, A. Ermilov, S. Konyukhov, S. Nemukhin, G. Sergeev] It is shown by IR-Fourier and UV-visible spectroscopy that two biligand complexes of different stoichiometric composition Ln·2L and 2Ln·2L (Ln = Eu; L = 4-pentyl-4′-cyanophenylpyridine) are formed in the course of low-temperature co-condensation of metal and ligand vapors on the surfaces cooled with liquid nitrogen. Quantum-chemical modeling of the equilibrium structures of the mono-and binuclear complexes of europium with unsubstituted cyanophenylpyridyl and para-ethylcyanophenylpyridyl ligands was carried out. The main geometrical parameters of these compounds were determined. For mononuclear complexes, there is a competition between two mechanisms of coordination of the metal atom: formation of sandwich π complexes by interactions with the π orbitals of the aromatic ligand system and σ coordination at the nitrogen atoms of the pyridine ring. The sandwich structures of the binuclear complexes with 4-ethylcyanophenylpyridine are stabilized by N H intermolecular contacts between the N atom of the cyano group and the terminal H atom of the ethyl group. The spectral shifts and the relative thermal stability of complexes with varying nuclearity are discussed. Springer Science+Business Media, Inc., 2007 molecular condensation nationallicence low-temperature spectroscopy nationallicence lanthanide complexes nationallicence metal-mesogen systems nationallicence DFT/B3LYP modeling nationallicence Shabatina T. Chemical Faculty, Moscow State University, Moscow aut Vlasov A. Chemical Faculty, Moscow State University, Moscow aut Ermilov A. Chemical Faculty, Moscow State University, Moscow aut Konyukhov S. Chemical Faculty, Moscow State University, Moscow aut Nemukhin S. Chemical Faculty, Moscow State University, Moscow aut Sergeev G. Chemical Faculty, Moscow State University, Moscow aut Journal of Structural Chemistry Springer US 48/4(2007-07-01), 765-773 0022-4766 48:4<765 2007 48 10947 https://doi.org/10.1007/s10947-007-0117-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10947-007-0117-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shabatina T. Chemical Faculty, Moscow State University, Moscow aut NATIONALLICENCE 700 1- Vlasov A. Chemical Faculty, Moscow State University, Moscow aut NATIONALLICENCE 700 1- Ermilov A. Chemical Faculty, Moscow State University, Moscow aut NATIONALLICENCE 700 1- Konyukhov S. Chemical Faculty, Moscow State University, Moscow aut NATIONALLICENCE 700 1- Nemukhin S. Chemical Faculty, Moscow State University, Moscow aut NATIONALLICENCE 700 1- Sergeev G. Chemical Faculty, Moscow State University, Moscow aut NATIONALLICENCE 773 0- Journal of Structural Chemistry Springer US 48/4(2007-07-01), 765-773 0022-4766 48:4<765 2007 48 10947 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer