I had never heard of a red nickel complex before, except for this nickel(I)cyanide complex. Every nickel complex I have seen so far ranged from green
to blue tot purple, with an exception being the yellow Ni(II)cyanide complex. I know otherwise now, after having isolated the nickel compound
dinitrotetraamminenickel(II) or [Ni(NH3)4(NO2)2], wich forms red crystals. |