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A series of novel neutral hexacoordinate silicon(IV) complexes with SiO(2)N(4) skeletons (compounds 4-8) was synthesized and structurally characterized by single-crystal X-ray diffraction and solid-state NMR spectroscopy ((13)C, (15)N, (29)Si). The silicon(IV) complexes each contain two bidentate monoanionic O,N Schiff base ligands and two cyanato-N or thiocyanato-N ligands. Compounds 4-8 were prepared from Si(NCO)(4) or Si(NCS)(4), whereby the complex formation involved some unexpected chemical transformations of the ligands.

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Synthesis and Structural Characterization of Neutral Hexacoordinate Silicon(IV) Complexes with SiO₂N₄ Skeletons

Metz

Burschka

Tacke

2009

Chemistry An Asian Journal

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Optically Active Zwitterionic λ⁵Si,λ⁵Si′‐Disilicates: Syntheses, Crystal Structures, and Behavior in Aqueous Solution

Theis

Burschka

Tacke

2008

Chemistry A European J

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The zwitterionic lambda(5)Si,lambda(5)Si'-disilicates 1-8 were synthesized and characterized by solid-state and solution NMR spectroscopy. In addition, compounds 26 H(2)O, 32 CH(3)CN, 45/2 CH(3)CN, 6CH(3)OH, 7, and 8CH(3)OHCH(3)CN were studied by single-crystal X-ray diffraction. The optically active (Delta,Delta,R,R,R,R)-configured compounds 1-8 contain two pentacoordinate (formally negatively charged) silicon atoms and two tetracoordinate (formally positively charged) nitrogen atoms. One (ammonio)alkyl group is bound to each of the two silicon centers, and two tetradentate (R,R)-tartrato(4-) ligands bridge the silicon atoms. Although these lambda(5)Si,lambda(5)Si'-disilicates contain SiO(4)C skeletons, some of them display a remarkable stability in aqueous solution as shown by NMR spectroscopy and ESI mass spectrometry.

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Zwitterionic and Anionic Multinuclear Pentacoordinate Silicon(IV) Complexes with Bridging (R,R)‐Tartrato(4−) Ligands and SiO₅ Skeletons: Synthesis and Reactivity in Aqueous Solution

Theis

Weiß

Lippert

et al. 2012

Chemistry A European J

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Not Unhydrolyzed at pH 8

Cited by 7 publications

References 6 publications

Synthesis and Structural Characterization of Neutral Hexacoordinate Silicon(IV) Complexes with SiO₂N₄ Skeletons

Synthesis and Structural Characterization of Neutral Hexacoordinate Silicon(IV) Complexes with SiO₂N₄ Skeletons

Optically Active Zwitterionic λ⁵Si,λ⁵Si′‐Disilicates: Syntheses, Crystal Structures, and Behavior in Aqueous Solution

Zwitterionic and Anionic Multinuclear Pentacoordinate Silicon(IV) Complexes with Bridging (R,R)‐Tartrato(4−) Ligands and SiO₅ Skeletons: Synthesis and Reactivity in Aqueous Solution

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Not Unhydrolyzed at pH 8

Cited by 7 publications

References 6 publications

Synthesis and Structural Characterization of Neutral Hexacoordinate Silicon(IV) Complexes with SiO2N4 Skeletons

Synthesis and Structural Characterization of Neutral Hexacoordinate Silicon(IV) Complexes with SiO2N4 Skeletons

Optically Active Zwitterionic λ5Si,λ5Si′‐Disilicates: Syntheses, Crystal Structures, and Behavior in Aqueous Solution

Zwitterionic and Anionic Multinuclear Pentacoordinate Silicon(IV) Complexes with Bridging (R,R)‐Tartrato(4−) Ligands and SiO5 Skeletons: Synthesis and Reactivity in Aqueous Solution

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Synthesis and Structural Characterization of Neutral Hexacoordinate Silicon(IV) Complexes with SiO₂N₄ Skeletons

Synthesis and Structural Characterization of Neutral Hexacoordinate Silicon(IV) Complexes with SiO₂N₄ Skeletons

Optically Active Zwitterionic λ⁵Si,λ⁵Si′‐Disilicates: Syntheses, Crystal Structures, and Behavior in Aqueous Solution

Zwitterionic and Anionic Multinuclear Pentacoordinate Silicon(IV) Complexes with Bridging (R,R)‐Tartrato(4−) Ligands and SiO₅ Skeletons: Synthesis and Reactivity in Aqueous Solution