12 research outputs found

    Structural difference due to intramolecular stacking interactions in dinuclear rhodium(III) complexes [{Rh(η5-C5Me5)(L)}2]n+containing pyrimidine-2-thionate and related ligands

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    Self-assembling reactions between [Rh(η5-C5Me5)(H2O)3]2+and pyrimidine-2-thionate(pymt) or related ligands[L; mpymt = 4-methyl-pyrimidine-2-thionate(1-), dmpymt = 4,6-dimethylpyrimidine-2-thionate(1-), apymt = 4-aminopyrimidine-2-thionate(1-), dapymt = 4,6-diaminopyrimidine-2-thionate(1-), or mpol = 2-sulfanyl-3-pyridinolate(2-)] were carried out and the products characterized by UV/vis, NMR spectroscopy, electrospray ionization mass spectrometry, and crystal structure analysis. All products are dinuclear rhodium(III) complexes of [{Rh(η5-C5Me5)(L)}2]n+: three crystal structures with mpymt, dmpymt and mpol were determined. The mpymt and dmpymt ligands co-ordinate through a 1κ2N,S:2κS mode and the two pyrimidine rings are located in cis position,whereas mpol adopts a five-membered chelating mode with 1κ2S,O:2κS and the two pyrimidine rings are located in trans position. Such structural difference can reasonably be explained by the intramolecular stacking interaction between the two bridging ligands
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