Elements of group 1

Ring Opening of Thiophene: Synthesis and Crystal Structure of Bis(diethyl ether)bis(μ4-{(3,4-η)-4-[1,1,3,3-tetramethyl-3-(2-thienyl)disilazan-1-yl-κN :κN]but-1-en-3-yne-1-thiolato(2−)-κS :κS :κS})tetralithium ([(C4H3S)SiMe2−N(Li)−SiMe2−C≡C−CH=CH−SLi⋅OEt2]2)

“…The LiÀS(1) and LiÀS(3) bond lengths (2.459(8) ± 2.557 (8) ) are in a range wellknown for thiolato lithium compounds [11]; the LiÀN (1.992(9) ± 2.099(8) ) and LiÀO (1.919(9) ± 1.928(10) ) bond lengths are typical for lithium amides [12] [13] or Li-atoms with Et 2 O donor molecules [11], respectively.…”