13967-06-1Relevant articles and documents
Microwave Spectrum, Inversion, and Molecular Structure of Monofluoramine, FNH2
Christen, D.,Minkwitz, R.,Nass, R.
, p. 7020 - 7024 (1987)
Microwave spectra of a new molecule, monofluoramine, and its deuterated isotopomers have been recorded and analyzed, yielding data on the molecular structure, dipole moment, quadrupole coupling, and barrier to inversion.The results are the following: A = 263 271.534 MHz, B = 26 357.357 MHz, C = 25 329.428 MHz, μa = 1.58 D, μc = 1.63 D, μtotal = 2.27 D, χaa = 7.16 MHz, χbb = -0.61 MHz, χcc = -6.55 MHz for the protonated species.The structural parameters are as follows: rNF = 143.29 pm, rNH = 102.25 pm, INV = 5200 cm-1.
Far infrared laser magnetic resonance spectrum of NF (a 1Δ)
Davies, P. B.,Temps, F.
, p. 6556 - 6559 (1981)
The NF radical in its a 1Δ metastable state has been detected by far infrared laser magnetic resonane spectroscopy at 513 μm.The spectrum arises from the J=7->8 rotational transition, and yields an accurate measurements for this spacing of 19.55172 cm-1
Photochemistry of Fluorochloroamines in Low-Temperature Argon Matrices
Conklin, Robert A.,Gilbert, Julanna V.
, p. 3027 - 3031 (1990)
Broad-band and single-wavelength photolysis studies of NFCl2 and NF2Cl in low-temperature argon matrices have been carried out and the photolysis products identified via the IR spectra of the matrices.The photolysis energies were chosen on the basis of the UV absorption spectra, which for both compounds consist of single broad structureless features at 270 nm for NFCl2 and at 230 nm for NF2Cl.Broad-band photolysis and photolysis at 250, 270, and 300 nm of the NFCl2 matrix produced NF, as identified by the appearance of a peak at 1113 cm-1 in the IR spectrum.Photolysis of the NFCl2/Ar matrix at 210 and at 330 nm and of the NF2Cl/Ar matrix at 210, 245, and 330 nm produced no changes in the IR spectrum.Mechanisms are presented to explain these results.
Production of N2(B3IIg,v'=1-12) in the Reaction between NF(a1Δ) and N(2D)
Davis, Steven J.,Piper, Lawrence G.
, p. 4515 - 4520 (1990)
Simultaneous determination of the absolute number densities of N(2D), NF(a), and N2(B3IIg,v'=1-12) in a discharge flow reactor yielded rate coefficients for reaction N(2D)+NF(a) -> N2(B,v'=1-12)+F of (2.5+/-1.1)*1E-10 cm3 molecule-1 s-1.We also observed Vegard-Kaplan emission from the reaction of N(2D) with NF(a).Most of the N2(A) formation, however, appears to result from radiative cascade from the N2(B) rather than as the result of a direct channel.
The microwave spectrum of the NF radical in the second electronically excited (b 1Σ+) state: Potentials of three low-lying states (X3Σ-, a 1A, b1Σ+)
Kobayashi, Kaori,Saito, Shuji
, p. 6606 - 6610 (1998)
The pure rotational transition of the NF radical in the second electronically excited state, b 1Σ+, was detected by microwave spectroscopy. The NF radical was generated by dc-discharge through a mixture of NF3 and H2 at around 90 K. Six rotational transitions for v= 0 and four for v = 1 were observed in the 73-442 GHz region. In addition to the rotational and centrifugal distortion constants, the quadrupole coupling constant of the nitrogen nucleus of NF(b 1Σ+) was determined for the first time from the lowest two transitions of NF in the v = 0 level. The spectrum of NF(a 1Δ) in the first vibrational excited state was also observed in order to derive highly accurate potential parameters for comparison with the data of NF(X 3Σ-,b 1Σ+).
Rates of Reactions of the Azide Radical
David, S. J.,Coombe, R. D.
, p. 3260 - 3263 (1986)
Discharge-flow methods are used to study chemiluminescence from the reaction of fluorine atoms with HN3 at low reagent densities.The initial products of this reaction are HF and N3 radicals.The azide radicals can react with excess F atoms present (to produce electronically excited NF) or with the reaction products and vessel walls.The latter processes generate electronically excited N2(B3Π8), such that the time decay of N3 in the system can be determined from the observed N2 first positive emission.From these measurements, the rate constant of the F + N3 reaction is determined to be (1.8 +/- 0.4)*E-12 cm3 s-1, and the rate constant for N3 removal by reaction products (HF and N3) is determined to be (2.0 +/- 0.4)*E-12 cm3 s-1.The rate constant for first-order removal of N3 at the Teflon walls of the reactor is 46 s-1, corresponding to an apparent efficiency γ = 2*E-2.The rate constant for removal of N3 by an excess flow of added N atoms is (1.4 +/- 0.2)*E-10 cm3 s-1, in accord with a previous estimate.A model is proposed in which the N2(B3Πg) observed in the F + HN3 system arises from production of N atoms by the collisional predissociation of N3 radicals, followed by the rapid N + N3 reaction.
Infrared diode laser spectroscopy of the fundamental band of NF(a 1Δ)
Davies, P. B.,Hamilton, P. A.,Okumura, M.
, p. 4294 - 4297 (1981)
Thirty-one lines of the fundamental vibration-rotation band of the NF free radical in its a 1Δ state have been detected in absorption near 8.6 μm using a tunable infrared diode laser.Linewidths were Doppler Limited and several transitions were accompanied by resolved hyperfine structure due to fluorine and nitrogen nuclear moments.Wave number calibration using accurately determined N2O lines yielded v0=1165.952 +/- 0.001 cm-1 for the band center.Rotational and centrifugal distortion constants for both v=0 and 1 states have also been determined.
Tunable UV laser photolysis of NF2: Quantum yield for NF(a1Δ) production
Heidner, R. F.,Helvajian, Henry,Koffend, J. Brooke
, p. 1520 - 1524 (1987)
The UV photodissociation of NF2 has been investigated frorn 240-270 nm, using tunable UV radiation from a frequency upconverted YAG pumped dye laser system.The absorption cross section of NF2, and the photolysis quantum yield for the fragment NF(a1Δ) were measured with 0.25 cm-1 resolution.The NF(a1Δ) quantum yield decreases at longer wavelengths and is only 1 percent at 260 nm.This suggests that the first long wavelength band in NF2 leads primarily to ground state NF(X3Σ), and that the existence of a new higher lying NF2 electronic state is responsible for the NF(a1Δ) production.
Line strengths of diatomics: The b 1Σ+v′=0→X 3Σ-v″=0 transition of the NF radical
Di Stefano,Lenzi,Piciacchia,Ricci
, p. 2752 - 2759 (1997)
Line intensities in the (0,0) band of NF(b 1Σ+→X 3Sigma;-) spin forbidden emission have been observed in a microwave apparatus. Deduced line strengths of the OP and SR well resolved branches are shown differently, in contrast with the theoretical prevision, and are interpreted by taking into account some peculiarities of the NF radical. An intermediate (a) and (b) Hund case is seen to apply to OP and SR in the whole rotational range examined. Accordingly, a reliable value for the effective transition moment μe is evaluated from the experiment.
Photolysis of FN3 at 193 nm
Patel, D.,Pritt, A. T.,Benard, D. J.
, p. 1931 - 1934 (1986)
The photolysis of FN3 by ArF excimer laser was found to yield both excited NF(b) and N2(A) photofragments in approimate yields of 5percent and 25percent, respectively.The photodissociation cross section at 193 nm was determined to be 2.8*10E-17 cm2 and the absorptin spectrum was recorded from 190 to 450 nm.The rates of NF(b) and N2(A) quenching by FN3 and NO were determined to be 8.7*10E5 and 1.1*10E6 torr1-s1-, respectively, and the heat of formation of FN3 was found to lie in the range of 120 to 135 kcal/mol.
