caa a22 4500 475847814 CHVBK 20180406123919.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1023/A:1009060614412 doi (NATIONALLICENCE)springer-10.1023/A:1009060614412 Water-Soluble Organometallic Compounds. 8[1]. Synthesis, Spectral Properties, and Crystal Structures of 1,3,5-Triaza-7-phosphaadamantane (PTA) Derivatives of Metal Carbonyl Clusters: Ru3(CO)9(PTA)3 and Ir4(CO)7(PTA)5 [Elektronische Daten] [Donald Darensbourg, Floyd Beckford, Joseph Reibenspies] The syntheses of Ru3(CO)9(PTA)3 and Ir4(CO)7(PTA)5 were accomplished through the thermal reactions of Ru3(CO)12 or Ir4(CO)12 with the water-soluble phosphine, PTA(1,3,5-triaza-7-phosphaadamantane). The ruthenium derivative was shown by X-ray crystallography to consist of a triangular Ru3 core with three nearly equal Ru-Ru bonds, with each ruthenium atom bearing an equatorially positioned PTA ligand. In Ir4(CO)7(PTA)5 the iridium atoms define a tetrahedron which is bridged on three edges by CO ligands. One basal iridium atom contains two PTA ligands, while the other two basal and the apical iridium atoms each possess one PTA ligand in their coordination spheres. Although, Ru3(CO)9(PTA)3 is only sparingly soluble in pure water, it is very soluble in aqueous solution of pH<4. Indeed the triruthenium cluster can be extracted reversibly between an aqueous and an organic phase (e.g., CH2Cl2) by changing the pH of the aqueous phase. On the other hand the more highly PTA substituted cluster, Ir4(CO)7(PTA)5, exhibits good solubility in aqueous solution (pH 7 and below) and a variety of organic solvents. Both cluster derivatives are stable in deoxygenated, aqueous solutions for extended period of time (>24 h). Plenum Publishing Corporation, 2000 ruthenium cluster nationallicence iridium cluster nationallicence metal carbonyls nationallicence water-soluble clusters nationallicence Darensbourg Donald Department of Chemistry, Texas A & M University, P.O. Box 30012, 77842-3012, College Station, Texas aut Beckford Floyd Department of Chemistry, Texas A & M University, P.O. Box 30012, 77842-3012, College Station, Texas aut Reibenspies Joseph Department of Chemistry, Texas A & M University, P.O. Box 30012, 77842-3012, College Station, Texas aut Journal of Cluster Science Kluwer Academic Publishers-Plenum Publishers 11/1(2000-03-01), 95-107 1040-7278 11:1<95 2000 11 10876 https://doi.org/10.1023/A:1009060614412 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1009060614412 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Darensbourg Donald Department of Chemistry, Texas A & M University, P.O. Box 30012, 77842-3012, College Station, Texas aut NATIONALLICENCE 700 1- Beckford Floyd Department of Chemistry, Texas A & M University, P.O. Box 30012, 77842-3012, College Station, Texas aut NATIONALLICENCE 700 1- Reibenspies Joseph Department of Chemistry, Texas A & M University, P.O. Box 30012, 77842-3012, College Station, Texas aut NATIONALLICENCE 773 0- Journal of Cluster Science Kluwer Academic Publishers-Plenum Publishers 11/1(2000-03-01), 95-107 1040-7278 11:1<95 2000 11 10876 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer