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- Title
Polymeric adducts of rhodium(II) tetraacetate with aliphatic diamines: natural abundance <sup>13</sup>C and <sup>15</sup>N CPMAS NMR investigations.
- Authors
Jaźwiński, Jarosław; Kamieński, Bohdan; Sadlej, Agnieszka
- Abstract
Complexation properties of dimeric rhodium(II) tetracarboxylates have been utilised in chemistry, spectroscopy and organic synthesis. Particularly, the combination of these rhodium salts with multifunctional ligands results in the formation of coordination polymers, and these are of interest because of their gas-occlusion properties. In the present work, the polymeric adducts of rhodium(II) tetraacetate with flexible ligands exhibiting conformational variety, ethane-1,2-diamine, propane-1,3-diamine and their N, N′-dimethyl- and N, N, N′, N′-tetramethyl derivatives, have been investigated by means of elemental analysis, 13C CPMAS NMR, 15N CPMAS NMR and density functional theory modelling. Elemental analysis and NMR spectra indicated the axial coordination mode and regular structures of (1 : 1) n oligomeric chains in the case of adducts of ethane-1,2-diamine, N, N′-dimethylethane-1,2-diamine N, N, N′, N′-tetramethylethane-1,2-diamine and N, N, N′, N′-tetramethylpropane-1,3-diamine. Propane-1,3-diamine and N, N′-dimethylpropane-1,3-diamine tended to form heterogeneous materials, composed of oligomeric (1 : 1) n chains and the additive of dirhodium units containing equatorially bonded ligands. Experimental findings have been supported by density functional theory modelling of some hypothetical structures and gauge-invariant atomic orbital calculations of NMR chemical shifts. Copyright © 2013 John Wiley & Sons, Ltd.
- Subjects
ORGANIC synthesis; CHEMISTRY; SPECTRUM analysis; COORDINATION polymers; OCCLUSION (Chemistry); DIAMINES
- Publication
Magnetic Resonance in Chemistry, 2013, Vol 51, Issue 12, p788
- ISSN
0749-1581
- Publication type
Article
- DOI
10.1002/mrc.4017