Reactivity of NHI‐Stabilized Heavier Tetrylenes towards CO<sub>2</sub> and N<sub>2</sub>O
Lisa Groll, John A. Kelly, Shigeyoshi Inoue
Abstract
Abstract A heteroleptic amino(imino)stannylene (TMS 2 N)(I t BuN)Sn: (TMS=trimethylsilyl, I t Bu=C[(N− t Bu)CH] 2 ) as well as two homoleptic NHI‐stabilized tetrylenes, (I t BuN) 2 E: (NHI= N ‐heterocyclic imine, E=Ge, Sn) are presented. VT‐NMR investigations of (I t BuN) 2 Sn: ( 2 ) reveal an equilibrium between the monomeric stannylene at room temperature and the dimeric form at −80 °C as well as in the solid state. Upon reaction of the homoleptic tetrylenes with CO 2 , both compounds insert two equivalents of CO 2 , however differing bonding modes can be observed. (I t BuN) 2 Sn: ( 2 ) inserts one equivalent of CO 2 into each Sn−N bond, giving carbamato groups coordinated κ 2 O,O’ to the metal center. With (I t BuN) 2 Ge: ( 3 ), the Ge−N bonds stay intact upon activation, being bridged by one molecule of CO 2 respectively, forming 4‐membered rings. Furthermore, the reactivity of 2 towards N 2 O was investigated, resulting in partial oxidation to form stannylene dimer [((I t BuN) 3 SnO)(I t BuN)Sn:] 2 ( 6 ).