Technetium pentacarbonyl fluoride [TcF(CO)5] was prepared for the first time by reaction of [TcI(CO)5] with solid AgF in a dichloromethane solution at −23 °C. Low temperature crystallization of the resulting compound in a glass vial yielded an unusual complex [Tc(CO)3(OH)0.49F0.51]4·[Tc(CO)5(BF4)] characterized by single crystal XRD.
![Graphical abstract: Does [TcF(CO)5] exist? The crystal and molecular structure of [Tc(CO)3(OH)0.49F0.51]4·[Tc(CO)5(BF4)]](http://hg.y866.cn/compound/lib/scimg/usr/1/C6DT00958A.jpg)
