η3-Allyl Coordination at Tin(II)-Reactivity towards Alkynes and Benzonitrile

We herein report the synthesis and characterization of a terphenyl‐substituted SnII allyl compound featuring an η3 coordination mode in solution and in the solid state. Two examples for the interesting reactivity of the allyl SnII molecule are presented: Reactions with terminal alkynes result in the formation of tricyclic compounds by CC bond formation and the dimerization of two Sn moieties whereas the reaction with benzonitrile leads to a sixteen‐membered ring system through CH activation. 3 to II: An example for the η3 coordination of an allyl group to a SnII center is presented. The allyl tin(II) compound undergoes allyl couplings in reactions with alkynes to yield tricyclic systems, and a sixteen‐membered macrocycle is formed with benzonitrile (see Scheme).