The Ruthenostannylene Complex [Cp*(IXy)H 2 Ru‐Sn‐Trip]: Providing Access to Unusual Ru‐Sn Bonded Stanna‐imine, Stannene, and Ketenylstannyl Complexes

Reactivity studies of the thermally stable ruthenostannylene complex [Cp*(IXy)(H) 2 RuSnTrip] ( 1 ; IXy=1,3‐bis(2,6‐dimethylphenyl)imidazol‐2‐ylidene; Cp*= η 5 ‐C 5 Me 5 ; Trip=2,4,6‐ i Pr 3 C 6 H 2 ) with a variety of organic substrates are described. Complex 1 reacts with benzoin and an α,β‐unsaturated ketone to undergo [1+4] cycloaddition reactions and afford [Cp*(IXy)(H) 2 RuSn( κ 2 ‐O,O‐ O CPhCPh O )Trip] ( 2 ) and [Cp*(IXy)(H) 2 RuSn( κ 2 ‐O,C‐ O CPhCH C HPh)Trip] ( 3 ), respectively. The reaction of 1 with ethyl diazoacetate resulted in a tin‐substituted ketene complex [Cp*(IXy)(H) 2 RuSn(OC 2 H 5 )(CHCO)Trip] ( 4 ), which is most likely a decomposition product from the putative ruthenium‐substituted stannene complex. The isolation of a ruthenium‐substituted stannene [Cp*(IXy)(H) 2 RuSn(Flu)Trip] ( 5 ) and stanna‐imine [Cp*(IXy)(H) 2 RuSn( κ 2 ‐N,O‐NSO 2 C 6 H 4 Me)Trip] ( 6 ) complexes was achieved by treatment of 1 with 9‐diazofluorene and tosyl azide, respectively.