 This salt will release molecular H2 when heated above 100 °C, a colour change was also observed from the colourless 2 to the orange-red 3 (both in THF).This reaction is reversed by reacting 3 with H2 at 25 ℃ where the colour change is reversed and 2 is reformed.The reaction of H2 with 3 was successful for temperatures as low as 25 ℃.