Is cyanide really a strong-field ligand?

Mikio Nakamura

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Iron man or weakling? Ligand-field strengths are conveniently expressed by the empirical spectrochemical series. Although cyanide has been deeply entrenched as a strong-field ligand, a couple of recent examples cast doubt toward the position of this ligand, namely the high-spin (S=2) states of [CrII(CN)5]3- and [FeII(tpp)(CN)] -. tpp=meso-tetraphenylporphinate.

Original languageEnglish
Pages (from-to)2638-2640
Number of pages3
JournalAngewandte Chemie - International Edition
Issue number15
Publication statusPublished - 2009 Mar 30
Externally publishedYes


  • Chromium
  • Crystal-field theory
  • Cyanide
  • Iron
  • Spin states

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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