Trifluoroselenoacetic acid, CF(3)C(O)SeH: preparation and properties.
The hitherto unknown trifluoroselenoacetic acid was prepared through the reaction of trifluoroacetic acid with Woollins' reagent. The compound was fully characterized by mass spectrometry, (1)H, (19)F, (77)Se, and (13)C NMR, UV-visible, IR and Raman spectroscopy, and the boiling point at 46 °C was estimated from the vapor pressure curve. An IR matrix isolation study revealed the presence of two different syn-anti and anti-syn conformers. The IR spectra of the two stereoisomers have been assigned, aided by DFT, and ab initio calculations. The UV photolysis of Ar matrix isolated CF(3)C(O)SeH yielded CO, OCSe, CF(3)SeH, and CHF(3). Apart from CF(3)SeH, these products were also obtained by vacuum flash-pyrolysis (310 °C) of gaseous CF(3)C(O)SeH. Instead of CF(3)SeH, CF(2)Se, and HF were detected among the pyrolysis products. The different decomposition pathways of CF(3)C(O)SeH are discussed.
Gómez Castaño
Jovanny A
JA
CEQUINOR (UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, Argentina.
Romano
Rosana M
RM
Beckers
Helmut
H
Willner
Helge
H
Della Védova
Carlos O
CO
D005463:Fluoroacetates; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010777:Photochemistry; D011789:Quantum Theory; D018036:Selenium Compounds; D013056:Spectrophotometry, Ultraviolet; D014269:Trifluoroacetic Acid / Q000138:chemical synthesis* / Q000737:chemistry*
D005463:Fluoroacetates; D018036:Selenium Compounds; C555682:trifluoroselenoacetic acid; D014269:Trifluoroacetic Acid