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New highly water-soluble rhodium complexes bearing 1,3,5-triaza-7-phosphaadamantane (PTA) and/or tris(hydroxymethyl) phosphine (THP) |
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| Authors: | Sandra Bolaño Maider Plaza Jesús Castro Luca Gonsalvi Alceo Macchioni |
| Institution: | a Departamento de Química Inorgánica, Universidade de Vigo, Campus Universitario, E-36310 Vigo, Spain b ICCOM-CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Firenze, Italy c Dipartimento di Chimica, Università di Perugia, via Elce di Sotto, 8, 06123 Perugia, Italy |
| Abstract: | A family of cationic and neutral highly water-soluble rhodium complexes Cp∗Rh(PTA)3]Cl2 (1), Cp∗RhCl2(THP)] (2), Cp∗RhCl(THP)2]Cl (3), and Cp∗RhCl(PTA)(THP)]Cl (4) have been synthesised and fully characterised PTA = 1,3,5-triaza-7-phosphaadamantane; THP = tris(hydroxymethyl)phosphine]. Their water-solubility increases as the number of the phosphines coordinated to the metal centre is increased. The X-ray crystal structure of compound 2 was obtained and shows the presence of intermolecular hydrogen bonding. NMR speciation studies of Cp∗RhCl2(PTA)] in deuterated water show the existence of several equilibria involving substitution processes in which the water molecules can substitute both chloride and PTA ligands. |
| Keywords: | Water-soluble complexes Rhodium Water-soluble phosphines X-ray crystallography |
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