Versatile coordinating abilities of acyclic N4 and N2P2 ligand frameworks in conjunction with Sn[N(SiMe3)2]2

摘要: The adaptability of three acyclic tetradentate ligands with the –CHR–CHR– (R = H or alkyl substituent) linker in backbone: bis(α-iminopyridine) L1 and reduced form L2 diaminodiphosphine L3 to stabilize various stannylenes has been explored. reaction two equivalents Sn[N(SiMe3)2]2 led stabilization a bisstannylene 1 through ene-amide transformation L1. B(C6F5)3 silver trifluoromethane sulfonate formation ligand stabilized Sn(II) dications 2 3 respectively. A mixture dication monocation 4 obtained from between trimethylsilyl sulfonate. 1 : 1 stoichiometric isolation dimeric monostannylene 5 having step-like structure Sn2N2 central ring. underwent an electron transfer ultimately leading isolation.