COMMUNICATIONS,14 CHEMICAL 1969 The Structure of a Three-Co-ordinate Iron( 11) Compound By D. C. BRADLEY, and P. F. RODESILERM. B. HURSTHOUSE,* (Department of Chemistry, Queen Mary College, Mile End Road, London, E.l) IN papers172 dealing mainly with the chemistry of bis-(trimethylsilyl)amine, Burger and Wannagat