10599-90-3Relevant articles and documents
Rate constants for quenching and self-annihilation of NCl(a1Δ)
Komissarov, Anatoly V.,Manke II, Gerald C.,Davis,Heaven, Michael C.
, p. 8427 - 8434 (2002)
Quenching and self-annihilation rate constants for NCl(a) have been determined using pulsed 248 nm photolysis of ClN3 to generate the metastable. Previous quenching measurements that employed different sources for NCl(a) yielded dramatically different rate constants. The present study provided quenching rate constants for Cl2, HCl, and H2 that are in good agreement with the discharge flow measurements of Hewett et al. (J. Phys. Chem. A 2000, 104, 539). Determination of the self-annihilation rate constant required knowledge of the branching fraction for NCl(a) formation for 248 nm photolysis of ClN3. This information was obtained from time-resolved measurements of NCl(X) formation and decay. A lower bound for the branching fraction of 0.7 was determined. Self-annihilation of NCl(a) was studied by using intense photolysis pulses to generate high concentrations of NCl(a). Analysis of the second-order decay component yielded a rate constant of (7.0 ± 1.5) × 10-13 cm3 s-1. This value is an order of magnitude smaller than the previous estimate (Henshaw et al. J. Phys. Chem. A 1997, 101, 4048).
Kinetics and Mechanism of the Reaction of NFCl2 with Hydrogen Atoms
Exton, D. B.,Gilbert, J. V.,Coombe, R. D.
, p. 7758 - 7762 (1991)
The reaction of gaseous NFCl2 with excess H atoms has been observed in a continuous flow reactor.The reaction produces excited singlet states (a1Δ, b1Σ+) of NF and NCl and is thougth to proceed by a two-step mechanism in which H atoms react with NFCl2 to produce primarily HCl and NFCl, followed by the H + NFCl reaction which proceeds to both HCl + NF and HF + NCl.The rate constant of the first step, H + NFCl2, is (2.6 +/- 0.2) * 10-12 cm3 s-1 at 298 K.The rate constant of the second step, H + NFCl, was too great to be accurately measured with our apparatus.Overall, the two-step process shows a roughly 10-fold preference for the production of NF(a1Δ) over NCl(a1Δ).The generation of both NF(a1Δ) and NCl(a1Δ) in this system results in energy pooling among these species which produces NF(b1Σ+).This process is significantly enhanced by the admission of HI to the reaction medium.
Sisler, H. H.,Neth, F. T.,Drago, R. S.,Yaney, D.
, p. 3906 - 3909 (1954)
Mattair, R.,Sisler, H. H.
, p. 1619 - 1622 (1951)
Photodissociation dynamics of C1N3 at 203 nm: The NC1 (a1Δ/X3∑-) product branching ratio
Hansen,Wodtke,Komissarov,Heaven
, p. 568 - 573 (2003)
Velocity map imaging was applied to study the photodissociation dynamics of ClN3 near 203 nm under collision free conditions. Images of state-selected N2(X1∑g+, v = 0. J = 68) characterize the interna
Abel, E.
, (1956)
Audrieth et al.
, p. 1428 (1954)
Coleman,Forrester
, p. 27 (1936)
Audrieth, L. F.,Rowe, R. A.
, p. 4726 - 4728 (1955)
The microwave spectrum of the NCI radical in the electronically excited (a1Δ) state
Kobayashi, Kaori,Goto, Masahiro,Yamamoto, Satoshi,Saito, Shuji
, p. 8865 - 8870 (1996)
The pure rotational spectrum of the 14N35Cl radical in the first electronically excited a 1Δ state was detected by microwave spectroscopy. The NCl radical was produced by a de-glow discharge of an N2 and Cl2 mixture between 175-210 K. Seven rotational transitions for ν=0 and five for ν=l, showing hyperfine structures due to the nitrogen and chlorine nuclei, were observed in the 162-404 GHz region. The rotational, centrifugal distortion, and hyperfine coupling constants including nuclear spin-rotation coupling constant of the chlorine nucleus were determined accurately by a least-squares analysis of the measured frequencies. The equilibrium structural parameters were derived and discussed.
Microwave spectrum of NCl in the second electronically excited state (b 1∑+)
Kobayashi, Kaori,Saito, Shuji
, p. 1068 - 1071 (1997)
The pure rotational transitions of N35Cl in the second electronically excited state, b 1∑+, were detected together with those of the isotopic species N37Cl by microwave spectroscopy. The NCl radical in the b 1∑+ state was generated by de-glow discharge of a N2/Cl2 mixture. The rotational constant, centrifugal distortion constant, and quadrupole coupling constants of the Cl nucleus were determined. The observation of rotational transitions in the vibrationally excited v = 1 state made it possible to derive equilibrium structural parameters. A discussion on the internuclear potential of the three low-lying electronic states of NCl is given.
Frierson, W. J.,Konrad, J.,Browne, J. W.
, p. 1696 - 1698 (1943)
Jander, J.
, p. 178 - 179 (1955)
Generation of Excited NCl by the Reaction of Hydrogen Atoms with NCl3
Exton, D. B.,Gilbert, J. V.,Coombe, R. D.
, p. 2692 - 2696 (1991)
Discharge-flow methods were used to study the reaction of gaseous NCl3 with excess hydrogen atoms.The system produces electronically excited NCl(a1Δ,b1Σ+) by a two-step mechanism in which the hydrogen atoms first react with NCl3 to produce HCl and NCl2 and then with NCl2 to produce HCl and excited NCl.From measurements of the time-dependence of NCl b1Σ+ -> X3Σ- chemiluminescence in the system, the two rate constants were found to be (9 +/- 4)*10-11 cm3 s-1 and (4.0 +/- 0.4)*10-12 cm3 s-1, both at 300 K.Based on the rates of analogous reactions with NF3 and NF2, the larger rate is tentatively assigned to the H + NCl2 reaction.The branching fraction for production of NCl(a1Δ) by H + NCl has a lower limit of 0.15.The propensity for production of NCl(a1Δ) by H + NCl2 is considered in terms of an addition-elimination mechanism similar to that operative in the analogous H + NF2 reaction.
Pyrrolotriazine compounds and applications thereof
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Paragraph 0094-0098, (2020/05/01)
The invention belongs to the field of medical chemistry, and particularly relates to a class of lactam-based histone deacetylase inhibitors and a preparation method thereof, a pharmaceutical composition containing the histone deacetylase inhibitor, and applications of the inhibitors in drugs for preventing and/or treating diseases related to histone deacetylase activity out-of-control.
