Dixon, David A. published the artcileStructural studies of tris(dialkylamino)sulfonium (TAS) fluorosilicates, Quality Control of 312-40-3, the publication is Heteroatom Chemistry (1993), 4(2-3), 287-95, database is CAplus.
The crystal structures of two pentavalent silicon anions are discussed. The structure of [SiMe3F2]–?1 shows a trigonal bipyramidal structure with the fluorines in apical positions. The Si-F bond distances are the longest known of this type. The crystal structure of fluorosilicate 2 (1,1-diphenyl-1-fluoro-3,3-bis[trifluoromethyl]-1,3-dihydro-2,1-benzoxasilole[ion 1-]) is distorted toward a rectangular structure along the Berry pseudorotation coordinate. The lone Si-F bond distance in 2 is much shorter than that in 1. The ab initio calculations on a variety of pentavalent fluorinated silicon anions are reported, and good agreement with the exptl. data are found. Fluoride affinities for the fluorosilanes are reported and are in reasonable agreement with the exptl. values where known. The fluoride affinity of the tetra-coordinated species is related to the length of the Si-F bond in the pentavalent anion.
Heteroatom Chemistry published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Quality Control of 312-40-3.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia