Synthesis of Mono‐coordinate Iron(II)‐phen Complex via a Solid State Ligand Exchange Process from Iron(II) Oxalate Dihydrate at Room Temperature under Mechanical Stressing

Mono‐coordinate iron(II)‐1,10‐phenanthroline (phen) complex was obtained in a solid state ligand exchange reaction under mechanical stressing by starting from a mixture of iron(II) oxalate dihydrate (FeC₂O₄ · 2H₂O) and phen, which was not available via a thermal route or from iron(II) chloride tetra hydrate (FeCl₂ · 4H₂O).

Keywords:

• Iron(II) complex
• ligand field distortion
• mechanical stressing
• solid state ligand exchange
• spin crossover

Acknowledgments

The authors thank to Drs. H. Inoue, N. Yoshioka and T. Isobe for valuable discussions. This work was supported by Grant‐in‐Aid for the 21st Century COE program “KEIO Life Conjugate Chemistry” from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.