in not given Tl2CO3 dissolved in HCOOH;;

in water aq. soln. of highly pure HCOOH;;

in not given byproducts: HCOOH; boiling dild. Ba(HCO2)2 soln. added to boiling Tl2SO4 soln. with stirring; pptn. and further boiling;; filtration, ppt. washed with strongly dild. HCOOH; filtrate repeatedly evapd. to dryness and redissolved in H2O until odour of HCOOH is gone;;

in not given byproducts: CO2, HCOOH; boiling;; crystn. on evapn.;;

in neat (no solvent) byproducts: Tl2CO3, H2; heating to 97°C;;

in neat (no solvent) byproducts: Tl2CO3, H2; heating to 97°C;;

in diethyl ether

in neat (no solvent) byproducts: Tl2CO3, H2; heating to 97°C;;