Synthesis and ligand substitution reactions of [Ta(CO)5NH3]-1

John E. Ellis, Kristi L. Fjare, Garry F. Warnock

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Protonation of Na3[Ta(CO)5] in liquid ammonia provides the thermally unstable Na[Ta(CO)5NH3], which may be isolated as the crystalline and deep violet salt [Ph4As][Ta(CO)5NH3]. Sodium amminepentacarbonyltantalate(1-) reacts with PMe3, PPh3, P(OMe)3, AsPh3, SbPh3, CNtBu and CN- at about 0°C in NH3/THF to give exclusively the corresponding [Ta(CO)5L]z. These have been isolated as tetraethylammonium salts in 54-84% yields.

Original languageEnglish (US)
Pages (from-to)379-384
Number of pages6
JournalInorganica Chimica Acta
Issue number1-2
StatePublished - Dec 1995


  • Ammonia complexes
  • Anionic complexes
  • Carbonyl complexes
  • Tantalum complexes


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