A new synthetic route to rhenium and iodine oxide fluoride anions: The reaction between oxoanions and sulfur tetrafluoride

Synthesis and Characterization of SF4 Adducts with Polycyclic Amines

“…Sulfur tetrafluoride has been of interest to chemists for fundamental geometry considerations, as well as for applications as a reagent in synthetic organic and inorganic chemistry. , In reactions with strong Lewis acids, such as SbF 5 , SF 4 acts as a fluoride-ion donor, yielding SF 3 + salts . Its chemistry as a fluoride-ion acceptor had been well-established toward “naked” fluoride sources .…”

Interactions between SF4 and Fluoride: A Crystallographic Study of Solvolysis Products of SF4·Nitrogen-Base Adducts by HF

“…1,2 Low-temperature Raman spectroscopic and X-ray crystallographic studies showed that SF 4 is Lewis acidic toward organic bases, forming 1:1 adducts with the nitrogen bases, trimethylamine, 3 pyridine, 4-methylpyridine, 2,6-dimethylpyridine, and 4-(dimethylamino)pyridine. 4 These adducts are stable below −40°C under dynamic vacuum and exhibit N---S IV dative bonds ranging from 2.141(2) to 2.514(2) Å. Sulfur tetrafluoride can also act as a Lewis acid toward strong fluoride ion donors, forming the SF 5 ] salt, which was first reported in 1963.…”

“…The N(H)---F contacts are much longer than those found in pyridinium bifluoride (2.508 Å) 12 and 4-methylpyridinium bifluoride [2.533(4) Å] (vide infra) and could be imposed by packing of the disordered pyridinium rings. The F---S---F contact angles alternate from 93.8(1)°[ S(1)] to 108.0(1)°[S (2)]. The small angle occurs between two adjacent bifluorides that exhibit disordered hydrogen bonds to the same pyridinium cations, while the large angle is observed when the bifluorides are hydrogen-bonded to two different pyridinium cations.…”

“…1,2 Low-temperature Raman spectroscopic and X-ray crystallographic studies showed that SF 4 is Lewis acidic toward organic bases, forming 1:1 adducts with the nitrogen bases, trimethylamine, 3 pyridine, 4-methylpyridine, 2,6-dimethylpyridine, and 4-(dimethylamino)pyridine. 4 These adducts are stable below −40 °C under dynamic vacuum and exhibit N---S IV dative bonds ranging from 2.141 (2) ] salt, which was first reported in 1963. 5 The Rb + , Cs + , and [(CH 3 ) 2 N] 2 S + salts of the SF 5 − anion have since been prepared and characterized by vibrational spectroscopy.…”

“…Sulfur tetrafluoride is a binary covalent fluoride that is of fundamental interest to inorganic chemistry and that has applications in organic as well as inorganic chemistry as a deoxofluorinating reagent. , Low-temperature Raman spectroscopic and X-ray crystallographic studies showed that SF 4 is Lewis acidic toward organic bases, forming 1:1 adducts with the nitrogen bases, trimethylamine, pyridine, 4-methylpyridine, 2,6-dimethylpyridine, and 4-(dimethylamino)­pyridine . These adducts are stable below −40 °C under dynamic vacuum and exhibit N---S IV dative bonds ranging from 2.141(2) to 2.514(2) Å. Sulfur tetrafluoride can also act as a Lewis acid toward strong fluoride ion donors, forming the SF 5 – anion.…”