Neutral Hexacoordinate Silicon(IV) Complexes with an SiSO3NC Skeleton and a Neutral Pentacoordinate Silicon(IV) Complex Containing a Trianionic Tetradentate O,N,O,O Ligand

摘要

The neutral hexacoordinate silicon(IV) complexes 8-10 (SiSO3NC skeleton) were synthesized by replacement of the chloro ligand of the pentacoordinate chlorosilicon(IV) complex 5 by monoanionic bidentate O,O ligands of the acetylacetonato type. For that purpose, compound 5 was treated with compounds of the formula type (RC)-C-1(O)-CH=C(OSiMe3)R-2 (R-1 = R-2 = Me; R-1 = R-2 = Ph; R-1 = Me, RI = Ph). In contrast, treatment of 5 with PhC(O)-CH C(CSiMe3)CF3 afforded the neutral pentacoordinate silicon(IV) complex 11 center dot CH3CN (SiO3NC skeleton). The identities of 8-10 and 11 center dot CH3CN were established by elemental analyses and solid-state and solution NMR experiments; additionally, the solvates 8 center dot CH3CN, 9 center dot CH3CN, 10 center dot CH3CN, and 11 center dot 2CH(3)CN were studied by single-crystal X-ray diffraction.