Synthesis and crystal structures of water-soluble rhodium(III) complexes with 1,4,7-triazacyclononane and 2,2-bipyridine supporting ligands

Hideki Hayashi, Hiromi Nishida, Seiji Ogo, Shunichi Fukuzumi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

New water-soluble rhodium(III) complexes with a tacn (1,4,7- triazacyclononane) and a bpy (2,2-bipyridine) supporting ligands were synthesized. The reaction of [RhIII(tacn)Cl3] (1) with equimolar amount of bpy and two equivalents of AgNO3 in H2O at reflux for 10 h gave a water-soluble chloro complex [Rh III(tacn)(bpy)Cl](NO3)2 {2(NO3) 2}. Complex 2(NO3)2 was treated with equimolar amount of AgNO3 in H2O at reflux for 10 h to give a water-soluble nitrato complex [RhIII(tacn)(bpy)(NO 3)](NO3)2 {3(NO3)2}. Water-solubility of 3 with NO3- ligand (46.5 mg/mL) is high compared with that of 2 with Cl- ligand (14.5 mg/mL) under the same conditions (at pH 7.0 at 25°C). The structures of 2 and 3 were unequivocally determined by X-ray analysis. Their structures in H2O were also examined by 1H NMR, IR, and electrospray ionization mass spectrometry (ESI-MS).

Original languageEnglish
Pages (from-to)2939-2944
Number of pages6
JournalInorganica Chimica Acta
Volume357
Issue number10
DOIs
Publication statusPublished - Jul 20 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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