Coordinatively unsaturated cobalt ion in Co+(H 2O)n (n = 4-6) probed with infrared photodissociation spectroscopy

Kazuki Furukawa, Kazuhiko Ohashi, Nobuhiro Koga, Toshitaka Imamura, Ken Judai, Nobuyuki Nishi, Hiroshi Sekiya

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29 Citations (Scopus)


The hydrated cobalt ions, Co+(H2O)n (n = 4-6), are studied with the infrared (IR) photodissociation spectroscopy in the OH-stretch region and density functional theory calculations. The calculations predict a T-shaped coordination structure for Co+(H 2O)3, which exposes empty coordination sites for additional H2O ligands. Nevertheless, the IR spectrum of Co +(H2O)4 indicates that the fourth H 2O prefers to occupy the second shell through H-bonding rather than coordinate directly to Co+. A comparison between the experimental and theoretical IR spectra suggests that the T-shaped coordination remains intact in the n = 4-6 ions, leaving the direct coordination sites unoccupied.

Original languageEnglish
Pages (from-to)202-206
Number of pages5
JournalChemical Physics Letters
Issue number4-6
Publication statusPublished - May 27 2011

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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