caa a22 4500 475760603 CHVBK 20180406123549.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1007/BF02496355 doi (NATIONALLICENCE)springer-10.1007/BF02496355 Investigation of structures of mono- and diorgano-substituted oligosiloxanes containing transition metal atoms [Elektronische Daten] [M. Levitsky, A. Kokorin, V. Smirnov] Oligomeric linear copper-containing diorganosiloxanes with a variable Cu : Si ratio and branched Cu- and Ni-containing organosiloxanes containing the γ-aminopropyl group at the Si atom were investigated. IR spectroscopic studies demonstrated that the distribution of metal atoms throughout the metallosiloxane chain in compounds with a high metal content (M : Si≥2) is rather uniform. According to the data from electronic spectroscopy, compounds under study are complexes of metal ions characterized by d-d transitions and an octahedral configuration of the coordination units. The CuII and NiII ions are coordinated by the NH2 groups primarily through interchain interactions. ESR spectroscopic studies demonstrated that the CuII ions are located predominantly in the main chain to form −O−Cu−O− fragments. The coordination polyhedron changes from a nearly planar square (in the solid phase) to an elongated tetragonal bipyramid (in solution). The spectral parameters of the Cu-containing oligomer containing the γ-aminopropyl group at the Si atom indicate that the N atoms of the amino groups are located in the equatorial plane of the Cu-containing coordination polyhedron. Kluwer Academic/Plenum Publishers, 2000 organometallosiloxanes nationallicence IR, UV, and ESR spectroscopy nationallicence structural studies nationallicence Levitsky M. A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 ul. Vavilova, 117813, Moscow, Russian Federation aut Kokorin A. N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977, Moscow, Russian Federation aut Smirnov V. Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, 119889, Moscow, Russian Federation aut Russian Chemical Bulletin Kluwer Academic Publishers-Plenum Publishers 49/10(2000-10-01), 1789-1793 1066-5285 49:10<1789 2000 49 11172 https://doi.org/10.1007/BF02496355 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02496355 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Levitsky M. A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 ul. Vavilova, 117813, Moscow, Russian Federation aut NATIONALLICENCE 700 1- Kokorin A. N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977, Moscow, Russian Federation aut NATIONALLICENCE 700 1- Smirnov V. Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, 119889, Moscow, Russian Federation aut NATIONALLICENCE 773 0- Russian Chemical Bulletin Kluwer Academic Publishers-Plenum Publishers 49/10(2000-10-01), 1789-1793 1066-5285 49:10<1789 2000 49 11172 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer