Koordinationsverbindungen des Trimethylzinn(IV)-di(fluorsulfonyl)amids: Ionische Komplexe mit einzähnigen Neutralliganden

Polysulfonylamines. CXIII. Coordination Compounds Derived from Trimethyltin(IV) Di(fluorosulfonyl)amide: Ionic Complexes with Monodentate Uncharged Ligands Me₃SnN(SO₂F)₂ reacts with two equivalents of the appropriate ligands to give the coordination compounds Me₃Sn(L)₂]^⊕(FSO₂)₂N^?, where L = OSMe₂ (complex 7 , previously known), N,N′-dimethylethyleneurea (complex 8 ), OPPh₃ or OP(NMe₂)₃. Low-temperature X-ray diffraction measurements revealed 7 (triclinic, space group P 1) and 8 (monoclinic, P2₁/c) to be ionic in nature; similar structures may be surmised for the other two compounds. The (FSO₂)₂N^? anion, ordered in 7 and disordered over two sites in 8 , adopts the usually observed conformation with pseudo-C₂ symmetry. The tin atoms have slightly distorted trigonal-bipyramidal coordination geometries, in which the apical positions are occupied by the oxygen atoms of the L ligands Sn–O bond lengths for 7 : 224.9(4) and 228.1(4) pm, for 8 : 227.5(2) and 228.6(2) pm].