Abstract 3, 4-Diethyl-1, 2, 5-thiadiborolenes (Ia—g, k) and Fe 2 (CO) 9 react to give stable thiadiborolenetricarbonyliron complexes (IIa—g, k). In IIa the B I function can be substituted by Me 2 NH, Et 2 O, AsF 3 and LiBH 4 to yield IIe, f, h and IIi, which leads to the synthesis of the unstable ligands 2, 5-dihydro-and 2-fluoro-5-iodo 1, 2, 5-thiadiborolene in IIh and IIi. Rapid oxidation of IIe occurs with iodine liberating 2, 5-bis (methylthio)-1, 2, 5- ...
