Thallium-transition-metal bonds reactions with

Salt elimination between a transition metal anion and a Group 13 halide is the most extensively exploited route into the formation of transition metal-Group 13 bonds in which the Group 13 element is in the -1-3 oxidation state. Most initial work focused on indium and thallium species and their reactions with mono-anionic carbonylmetaUates. Early examples indude [CpMo(CO)3]3Tl formed via the reaction of TljSO with 3 equiv. of Na[CpMo(CO)3] [202-204]. 

Thallium derivatives of transition-metal carbonyls are used to prepare compounds in which Sn is bonded to two different transition metals. Reaction conditions are mild—THF at RT for 0.25 h—and yields are good (80-90%). Reactions with -CpCr(CO)3Tl, which must be carried out in the dark, yield (CO)4CoSnCl2Mn(CO)4(PPh3), > -Cp(CO)3CrSnCl2Mn(CO)4(PPh3), (CO)4CoSnCl2Fe(CO)2Cp- / and i -Cp(CO)3CrSnCl2Fe(CO)2Cp-j/. ... 

---