Synthesis And Structural Characterization Of Novel Neutral Hexacoordinate Silicon(Iv) Complexes With Sio2n4 Skeletons

Treatment of Si(NCO)(4) or Si(NCS)(4) with 4-aminopent-3-en-2-ones yielded novel neutral hexacoordinate silicon(IV) complexes with an SiO2N4 framework, compounds 3 - 6. These silicon(IV) complexes were characterized in the solid state by single-crystal X-ray diffraction and Si-29 VACP/MAS NMR spectroscopy. Compounds 3 - 5 crystallized as the (OC-6-12)-isomer, and 6 was isolated as the trans-isomer.