1-ChloroMethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate)
Synonym(s):N-Chloromethyl-N′-fluorotriethylenediammonium bis(tetrafluoroborate);F-TEDA
- CAS NO.:140681-55-6
- Empirical Formula: C7H14B2ClF9N2
- Molecular Weight: 354.26
- MDL number: MFCD00142607
- EINECS: 414-380-4
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-12-18 14:07:02
What is 1-ChloroMethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate)?
Description
Selectfluor is a source of electrophilic fluorine. Selectfluor is very effective, safe, non-toxic, and easy to handle making it a convenient reagent for large scale synthesis. Historically electrophilic fluorinations were done using molecular fluorine (F2) which is very toxic and difficult to handle.
Description
1-ChloroMethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate)(Selectfluor) is a white solid (mp 190 °C), stable in air and to moisture. It is a dicationic salt soluble in cold water or dilute hydrochloric acid. However, it decomposes in dilute sodium hydroxide and reacts with cold DMSO (rapidly and exothermally) and with DMF (slowly on heating). It is moderately soluble in acetonitrile but only slightly soluble in lower alcohols and acetone, which makes the former the solvent of choice. Occasionally, reactions in these solvents were accelerated by adding a small amount of water or trifluoroacetic acid. Bulk quantities of Selectfluor should be stored in a cool, dry place and not heated above 80 °C. Fainzil’berg et al. have measured the reduction potentials of Selectfluor and other N-F compounds. With a positive reduction potential, E1/2 ) 0.33 V, Selectfluor is predicted to be a more reactive fluorinating reagent than, e.g., N-fluorobenzenesulfonimide, with E1/2 ) -1.24 V[1].
Chemical properties
White powder
The Uses of 1-ChloroMethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate)
Effective electrophilic fluorinating reagent for a wide variety of substrates such as aromatics, alkenes, carbohydrates, etc.
The Uses of 1-ChloroMethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate)
Mild, versatile fluorinating reagent used in pharmaceutical and agricultural applications.
General Description
This product is a fluorine donor also called Selectfluor and has been enhanced for catalysis.
Toxicology
1-ChloroMethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) (F-TEDA-BF4) is moderately toxic (male rat oral LD50 640 mg kg?1; female rat 350–500 mg kg?1), and is an irritant to the eye and respiratory system. Always use approved dust mask (or respirator), gloves, and safety glasses when handling the solid. Carry out solubility tests on a sensible scale when seeking alternative solvents (note the problem with DMSO referred to above).
Advantages
As the advantages of non-toxicity, non-corrosion and chemical stability, 1-ChloroMethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) have been widely used in industry and public life.
References
[1] Rajendra P. Singh, Jean’ne M. Shreeve. “Recent Highlights in Electrophilic Fluorination with 1-Chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane Bis(tetrafluoroborate).” ChemInform 35 16 (2004).
Properties of 1-ChloroMethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate)
Melting point: | 260 °C(lit.) |
Density | 1.71 at 20℃ |
vapor pressure | 0.001Pa at 25℃ |
storage temp. | 2-8°C |
solubility | Acetonitrile (Slightly), DMSO (Slightly), Methanol (Very Slightly, Heated), Water |
appearance | Colorless solid |
form | Powder |
color | White |
Water Solubility | soluble |
Sensitive | Moisture Sensitive |
Merck | 14,8425 |
BRN | 5368649 |
CAS DataBase Reference | 140681-55-6(CAS DataBase Reference) |
EPA Substance Registry System | 1,4-Diazoniabicyclo[2.2.2]octane, 1-(chloromethyl)-4-fluoro-, bis[tetrafluoroborate(1-)] (140681-55-6) |
Safety information for 1-ChloroMethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate)
Signal word | Danger |
Pictogram(s) |
Corrosion Corrosives GHS05 Exclamation Mark Irritant GHS07 |
GHS Hazard Statements |
H302:Acute toxicity,oral H317:Sensitisation, Skin H318:Serious eye damage/eye irritation H412:Hazardous to the aquatic environment, long-term hazard |
Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 1-ChloroMethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate)
InChIKey | ZQGDSZPGKPJABN-UHFFFAOYSA-N |
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