scholarly journals Neutral Pentacoordinate Silicon Fluorides Derived from Amidinate, Guanidinate, and Triazapentadienate Ligands and Base-Induced Disproportionation of Si2Cl6to Stable Silylenes

2011 ◽  
Vol 50 (1) ◽  
pp. 358-364 ◽  
Author(s):  
Rajendra S. Ghadwal ◽  
Kevin Pröpper ◽  
Birger Dittrich ◽  
Peter G. Jones ◽  
Herbert W. Roesky
Keyword(s):  
Pentacoordinate Silicon

Synthesis and structural characterisation of neutral pentacoordinate silicon(iv) complexes with a tridentate dianionic N,N,S chelate ligand

2012 ◽  
Vol 41 (7) ◽  
pp. 2148-2162 ◽  
Author(s):  
Claudia Kobelt ◽  
Christian Burschka ◽  
Rüdiger Bertermann ◽  
C. Fonseca Guerra ◽  
F. Matthias Bickelhaupt ◽  
...  
Keyword(s):  
Chelate Ligand ◽  
Structural Characterisation ◽  
Pentacoordinate Silicon

Hypercoordinate Diorganosilanes Featuring an 〈ONO〉 Tridentate Ligand. A Surprising EquilibriumBetween Penta- and Tetracoordination

2007 ◽  
Vol 62 (2) ◽  
pp. 225-234 ◽  
Author(s):  
Jörg Wagler ◽  
Erica Brendler
Keyword(s):  
Solid State ◽  
Chloroform Solution ◽  
Tridentate Ligand ◽  
Precursor Molecule ◽  
Pentacoordinate Silicon ◽  
Shift Reaction

The reaction of the tridentate ligand-precursor molecule 1, o-HO-p-MeO-C6H3-C(Ph)=N-(o-C6H4)-OH, with diorganodichlorosilanes Me2SiCl2, Ph2SiCl2 and PhAllSiCl2 yields pentacoordinate silicon complexes R,R′Si[o-O-p-MeO-C6H3-C(Ph)=N-(o-C6H4)-O] (2a′: R, R′ = Me; 2b: R, R′ = Ph; 2c: R = Ph, R′ = All). 2b and 2c have pentacoordinate silicon atoms in the solid state as well as in chloroform solution. Surprisingly, for 2a an isomer 2a′ with Si-tetracoordination is preferred in the solid state, while the Si-pentacoordinated isomer 2a may dominate in solution. The hypercoordinate allylsilane 2c with a C=X→Si moiety is stable in solution and does not undergo a 1,3-allyl-shift-reaction.

Strukturchemie von Verbindungen des pentakoordinierten Siliciums. Das Bis(ethylendioxy)methylsilan-Anion / Structural Studies of Pentacoordinate Silicon. The Bis(ethylenedioxy)methylsilane Anion

1982 ◽  
Vol 37 (2) ◽  
pp. 195-197 ◽  
Author(s):  
Dietmar Schomburg
Keyword(s):  
Hydrogen Bonds ◽  
Silicon Atom ◽  
Trigonal Bipyramid ◽  
Structural Studies ◽  
Space Group ◽  
Bond Lengths ◽  
Twofold Axis ◽  
Pentacoordinate Silicon ◽  
Pentacoordinate Silicon Atom

Abstract Hexamethylendiammonium-bis(ethylenedioxy)methylsilane crystallizes in the hexagonal space group P6122, Z = 6 with a= 11.902(1), c = 30.148(4) A. The structure was refined to R - 0.041 using 2281 independent reflections. The geometry around the pentacoordinate silicon atom is between a trigonal bipyramid and a square pyramid. Oeq-Si-Oeq 136.0(1)°, Oax-Si-Oax 161.7(1)°. The Si-Oax bond lengths are 1.749(2) and 1.769(2) A, the Si-Oeq 1.711(2) and 1.735(2) A, Si-Ceq 1.876(3) A. The compound forms strong N-H ··· O hydrogen bonds between cation and anion. The cation lies on a crystallographic twofold axis

A Zwitterionic Spirocyclic Pentacoordinate Silicon Compound Synthesized in Water by SiO and SiC Bond Cleavage

2005 ◽  
Vol 44 (33) ◽  
pp. 5292-5295 ◽  
Author(s):  
Reinhold Tacke ◽  
Rüdiger Bertermann ◽  
Christian Burschka ◽  
Simona Dragota
Keyword(s):  
Bond Cleavage ◽  
Silicon Compound ◽  
Pentacoordinate Silicon

Cover Picture: Neutral Pentacoordinate Silicon(IV) Complexes with Silicon-Chalcogen (S, Se, Te) Bonds (Chem. Eur. J. 30/2009)

2009 ◽  
Vol 15 (30) ◽  
pp. 7255-7255
Author(s):  
Bastian Theis ◽  
Stefan Metz ◽  
Christian Burschka ◽  
Rüdiger Bertermann ◽  
Stefan Maisch ◽  
...  
Keyword(s):  
Pentacoordinate Silicon
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