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, Bastian; Weiß, Jörg; Lippert, W. Peter; Bertermann, Rüdiger; Burschka, Christian; Tacke, Reinhold

doi:10.1002/chem.201102815

Cited by 28 publications

(3 citation statements)

References 25 publications

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“…Zwitterionic λ 5 Si, λ 5 Si′ disilicates containing SiO 4 C skeletons with five‐ring chelates made up of hydroxy‐ and carboxy‐oxygen atoms have recently been investigated 6. Complexes of tartaric acid are also known with elements such as lithium,7,8 antimony,9 bismuth,10 vanadium,11,12 copper,13 cobalt,14 and samarium 15.…”

Section: Introductionmentioning

confidence: 99%

Reversible Layer‐by‐Layer Deposition on Solid Substrates Inspired by Mussel Byssus Cuticle

Kim

Kang

2013

Chemistry An Asian Journal

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The protective coating on mussel (Mytilus galloprovincialis) byssus has attracted considerable research interest because of its excellent mechanical properties such as hardness and extensibility. These special properties are known to be highly related with specific interactions between mussel foot protein-1 and metal ions. In particular, the complexation between catechols in mfp-1 and iron(III) has been identified as a key interaction. This finding has given opportunities for pursuing promising applications. Herein, we report that emulating the properties of the mussel byssus cuticle provides an important platform for developing reversible layer-by-layer (LbL) deposition, an advanced technique for surface modification. LbL films were constructed on solid substrates by sequential immersion of substrates into solutions containing iron(III) and catecholic compounds. The thickness of the LbL films was effectively controlled by increasing the immersion steps, and the reversibility of the LbL deposition was demonstrated by addition of a chelating agent.

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Section: Introductionmentioning

confidence: 99%

Reversible Layer‐by‐Layer Deposition on Solid Substrates Inspired by Mussel Byssus Cuticle

Kim

Kang

2013

Chemistry An Asian Journal

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“…This result also supports the above hypothesis. Recently, Tacke's group reported the isolation and crystal structure of anionic pentacoordinate silicon complexes . These species are analogous to our proposed intermediate.…”

Section: Resultsmentioning

confidence: 99%

Stereoisomerization of Cyclic Silanols

Endo

Takeda

Unno

2017

Chemistry An Asian Journal

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Stereoisomerizationo fr eadily available all-cis-1, 3,5,7-tetrahydroxy-1,3,5,7-tetraisobutylcyclotetrasiloxane (1a)w as carried out under acidic conditions to afford cistrans-cis (1b), all-trans (1c), and cis-cis-trans (1d)i somers. The compounds in the reactionm ixture could be easily separated into 1a and am ixture of 1b, 1c,and 1d by the treatment with chloroform. Compounds 1b, 1c,and 1d were further separated and isolated, and each structure was identified. The experimental results indicated that the most plausible mechanism is as ubstitution reaction at the silicon center via ap entacoordinate intermediate without ac yclic siloxane bond cleavage reaction. The obtained isomer 1a or 1b further reactedw ith dichlorodiphenylsilane in the presence of triethylamine to give syn-type laddersiloxane (2a)o rantitype laddersiloxane (2b), respectively.

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“…This is somewhat surprising, since the compounds of hypervalent silicon normally show enhanced reactivity in reactions with both electrophiles and nucleophiles . A hydrolysis reaction is not an exception; according to theoretical and experimental data, the pentacoordinated silicon compounds with different types of coordination (silatranes and O→Si chelates), including pentacoordinated fluorosilanes, react with water . N‐(Silylmethyl)phosphoramides R 2 P(O)NR′CH 2 SiMe 3–n Hal n having relatively weak coordination bond P=O→Si (2.1 < d SiO < 2.7 Å) give complexes with chloroform .…”

Section: Introductionmentioning

confidence: 99%

Effect of proton donors on the intramolecular coordination C=O→Si-F in (acyloxymethyl)trifluorosilanes.Ab initio,DFT and FTIR study, QTAIM analysis

Chípanina

Lazareva

Aksamentova

et al. 2014

J. Phys. Org. Chem.

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The intramolecular С=O→Si coordination in H‐complexes of (acetoxymethyl)trifluorosilane and (benzoyloxymethyl)trifluorosilane with proton donors HCl, PhOH, MeOH, and CHCl3 was investigated by density functional theory and second‐order Møller‐Plesset perturbation theory (MP2) methods. Interrelation and mutual influence of the intramolecular coordination bond С=O→Si and intermolecular hydrogen bonds C=O···H and Si–F···H in H‐complexes was established using the AIM and NBO analyses. The С=O→Si coordination is weakened by the C=O···H hydrogen bonding but enhanced by the Si–Fax···H hydrogen bonding. The structure of H‐complexes of (acetoxymethyl)trifluorosilane with proton donors in solution was determined by comparing the ν(C=O) and ν(Si–F) frequencies calculated using the conductor‐like polarizable continuum model and their experimental Fourier transform infrared values. Copyright © 2014 John Wiley & Sons, Ltd.

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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

Cited by 28 publications

References 25 publications

Reversible Layer‐by‐Layer Deposition on Solid Substrates Inspired by Mussel Byssus Cuticle

Reversible Layer‐by‐Layer Deposition on Solid Substrates Inspired by Mussel Byssus Cuticle

Stereoisomerization of Cyclic Silanols

Effect of proton donors on the intramolecular coordination C=O→Si-F in (acyloxymethyl)trifluorosilanes.Ab initio,DFT and FTIR study, QTAIM analysis

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