Four independent structures of a pentacoordinate silicon species at different points on the Berry pseudorotation pathway

Abstract

A new pentacoordinate silicon species containing two chelating ligands has been synthesized. The structures of four independent cations of the same compound correspond to different points on the Berry pseudorotation pathway. The percentage of square planar character varies between 19% and 40%.

One-pot solvothermal synthesis of a well-ordered layered sodium aluminoalcoholate complex: a useful precursor for the preparation of porous Al2O3 particles

“…Solvothermal synthesis involving polyols ( e.g. , 1,2-diols) as the solvent has so far been moderately explored for the preparations of novel zeolites, 7 silicopolyolate containing interesting [5] Si species, 8 and aluminoglycolate analogue containing fascinating [5] Al geometry. 9 For example, Gainsford et al .…”

Conformations of 4‐tert‐Butyloxy‐, 4‐(Trimethylsilyl)oxy‐ and 4‐(Trimethylstannyl)oxy‐6‐methyl‐2H‐pyran‐2‐ones in the Crystalline State and in Solution

“…[71 -73] Combing the solid-state data with NMR studies has broadened our knowledge considerably. [74,75] The focus of published work mainly aims at the geometry of the coordination sphere of the central metal atom. In our study the exact topology and conformation of the 'organic ligand' is just as interesting.…”

Neutral and Cationic Bis-Chelate Monoorganosilicon(IV) Complexes of 1-Hydroxy-2-pyridinone

“…The large number of pentacoordinate silicon complexes in the Cambridge Structural Database reveals most, if not all, molecular shapes falling along the Berry pseudorotation continuum between ideal trigonal-bipyramidal (TBP) and square-pyramidal (SP) geometries . Significant variations in molecular shape along this continuum have been observed between crystalline forms of the same compound, and even within the same crystal of the same compound, which were attributed to underlying crystal-packing effects.…”