Koordinationsverbindungen des Trimethylzinn(IV)-di(fluorsulfonyl)amids: Ionische Komplexe mit einzähnigen Neutralliganden
摘要:
Me3SnN(SO2F)(2) reacts with two equivalents of the appropriate ligands to give the coordination compounds [Me3Sn(L)(2)](+)(FSO2)(2)N-, 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) over bar) and 8 (monoclinic, P2(1)/c) to be ionic in nature; similar structures may be surmised for the other two compounds. The (FSO2)(2)N- anion, ordered in 7 and disordered over two sites in 8, adopts the usually observed conformation with pseudo-C-2 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: 2275(2) and 228.6(2) pm].