IR and Visible Absorption Spectrum of the Fluoroformyloxyl Radical, FCO2.bul., Isolated in Inert Gas Matrixes

IR and UV Spectra of the Matrix‐Isolated Peroxy Radicals CF3OO,trans‐FC(O)OO, andcis‐FC(O)OO

“…The matrix that contained FC(O)OO and FCO 2 (the latter has a strong visible absorption [31] ) was irradiated with visible light from a tungsten halogen lamp; this bleached the blue matrix to colourless within minutes. The IR spectrum shows the decay of FCO 2 , the formation of CO 2 and formation of no further products.…”

“…Matrix-isolated radicals can be produced in excellent yields by vacuum flash pyrolysis of thermally labile precursors, highly diluted in argon or neon, followed by quenching the products as a matrix at low temperatures. Recent examples are FCO 2 [31] and ClO 3 , [32] formed by dissociation of the precursors FC(O)OOC(O)F and ClOClO 3 , respectively. Suitable thermally labile precursors for the syntheses of the peroxy radicals XOO (X CF 3 , CFO) are the peroxy nitrates XOONO 2 (X CF 3 , [7] FCO [6] ) and the trioxides XOOOX (X CF 3 , [16] FC(O)).…”

The Missing Link: Triplet Fluorocarbonyl Nitrene FC(O)N

“…The two lowest excited electronic states, (A 2 A 2 ) and (B 2 A 1 ), have been investigated both theoretically [22,23] and experimentally. [21,24,25] They correspond to one-electron promotion from the HOMOs (3a'', 12a') into the SOMO (13a', note that these orbitals with C 2v symmetry transform into the a 2 , a 1 , and b 2 representations, respectively), and the corresponding adiabatic transition energies are estimated to be…”

Vibrational Spectra of cis and trans Oxalyl Fluoride and Their Site-Selective IR-Induced Rotamerization in an Argon Matrix

“…Matrix-isolated samples of equilibrium mixtures (FCO) 2 (cis/trans)/Ar (1:1000) held at ϩ21°C or Ϫ40°C were obtained by trapping the molecular beam at 10 K on the matrix support. Details of the experimental setup (11) and the matrix apparatus (19) have been given elsewhere.…”