Klanberg, Frank published the artcileNuclear magnetic resonance studies on pentacoordinate silicon fluorides, Product Details of C12H10F2Si, the publication is Inorganic Chemistry (1968), 7(1), 155-60, database is CAplus.
The 19F and 1H N.M.R. spectra of fluorosilicate anions SiF5, RSiF4- (R’ = alkyl, aryl), and (C6H5)2SiF3- have been examined as a function of temperature and solvent polarity. The spectra are consistent with the thesis that these anions exist as pentacoordinate entities in solvents of low polarity. The low-temperature spectra of SiF5- and RSiF4- show spectroscopic equivalence of all F atoms in these species, probably the result of rapid intramol. rearrangements. The spectrum of (C6H5)2SiF3- establishes two different F atom environments at low temperature which are ascribed to axial and equatorial positions in a trigonal-bipyramidal (C2)v configuration for the anion. Above -40¡ã, these two environments are averaged out into a single resonance. Spin coupling between Si and F nuclei (29Si-19F), as well as between F and H nuclei (19F-Si-C-H1), vanishes upon addition of excess fluoride ion or in protonic solvents such as water and alc. This in conjunction with the dramatic broadening of the 19F resonances observed under these conditions is rationalized in terms of rapid intermol. exchange RSiF4- + F*- ? RSiF3F*- + F-. 21 references.
Inorganic 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, Product Details of C12H10F2Si.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia