7782-79-8Relevant articles and documents
New topology in azide-bridged cobalt(11) complexes: The weak ferromagnet [Co2(N3)4(HexamethylenetetramineKH 2O)]n
Mautner, Franz A.,Oehrstroem, Lars,Sodin, Beate,Vicente, Ramon
, p. 6280 - 6286 (2009)
A new polynuclear azido-bridged Co(11) compound with formula [Co 2(N3)4(HMTA)(H2O)]n (1) (HMTA = hexamethyl-enetetramine) has been structurally and magnetically characterized. The compound 1 crystalli
Mechanism of the Reaction of NH(1Δ) with NO in Argon Matrix
Yokoyama, Keiichi,Kitaike, Hiroshi,Fueno, Takayuki
, p. 1731 - 1737 (1991)
Matrix-isolated hydrazoic acid HN3 admixed with NO was photolyzed by a low-pressure mercury discharge lamp.Product analysis based on the FTIR spectroscopy has revealed the formations of NH, N2O, OH, HNO, and HONO as photoproducts.From the comparisons of the amount of HN3 consumed with that of N2O produced, we conclude that the reaction of NH(1Δ) with NO proceeds mainly through the process NH(1Δ)+NON2O+H.The quantum yield of N2O is found to be Φ1=0.7+/-0.1.The conclusion is in line with our previous results of the gas phase experiments at room temperature.
Phenylborylene: Direct spectroscopic characterization in inert gas matrices
Bettinger, Holger F.
, p. 2534 - 2535 (2006)
The photolysis of bisazidophenylborane isolated in cryogenic matrices results in phenylborylene, a subvalent boron(I) species with a singlet ground state. Broad band irradiation of phenylborylene causes formation of benzoborirene by insertion into an ortho-CH bond. Copyright
3D azido-bridged cobalt(II) complexes with diazines as coligands
Mautner, Franz A.,Sodin, Beate,Vicente, Ramon
, p. 23 - 27 (2011)
Two new three-dimensional azido-bridged Co(II) compounds with formula [Co(N3)2(2,5-Me2pyz)]n (1) and [Co(N3)2(2-ampym)]n (2) have been structurally and magnetically characterized
Temperature dependence of the UPS and HREELS of HN3 and DN3 on Si(110)
Bu,Chu,Lin
, p. L151 - L156,L151-L156 (1992)
HN3 was used for the first time as a nitrogen source for nitridation of Si surfaces. Its interaction with Si(110) was studied with HREELS and UPS at temperatures between 120 and 1350 K. HN3 was found to adsorb molecularly on the Si surface at 120 K, as all molecular vibrational peaks, such as HN-NN stretching at 150 meV, HNN=N stretching at 265 meV and H-NNN stretching at 414 meV, were clearly observed in HREEL spectra. A similar HREELS study of DN3 was carried out to confirm some of the EELS assignments. Upon warming up to 220 K, HN3 started to dissociate into N2 and NH, which further dissociated to give N and H as the surface was annealed from 580 to 800 K, H adatoms were observed to desorb at T > 800 K, while N remained on the surface, forming Si3N4 at T ? 1350 K.
Synthesis of Al(N3)3 and the deposition of AlN thin films
Linnen,Macks,Coombe
, p. 1602 - 1608 (1997)
Al(N3)3 is produced by the stoichiometric reaction between Al(CH3)3 and excess HN3 at room temperature. The reaction is thought to proceed by the addition of HN3 to Al(CH3)3 followed by elimination of CH4, repeated three times to produce the fully azidified Al(N3)3. The product Al(N3)3 is nonvolatile and condenses as a film on the walls of the reaction vessel. The reaction products were observed in the gas phase and in low-temperature argon matrices by FTIR spectroscopy. Ab initio methods were used to compute the geometry and frequencies of Al(N3)3, and the results are in good agreement with experimental data. The films produced upon condensation of Al(N3)3 contain the Al-N2 complex and AlN as well as the azide. Heating the films to 400 K removes the azide and the Al-N2, leaving AlN. This method may be useful as a low-temperature route to the synthesis of AlN thin films.
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Bendtsen, Joergen,Nicolaisen, Flemming M.
, p. 456 - 466 (1986)
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Identification of a surface azide from the reaction of HN3 with C(100)
Thoms,Russell Jr.
, p. L807 - L811,L807-L811 (1995)
The reaction of hydrogen azide, HN3, with bare and hydrogenated diamond (100) was studied using high resolution electron energy loss spectroscopy (HREELS). Hydrogen azide adsorbs molecularly on the hydrogenated diamond surface at 100 K and desorbs without reacting at 3 reacts with C(100) at 100 K by breaking the N-H bond to form C-N3 and C-H surface species. The breaking of the N-H bond is in contrast to the reaction mechanism of HN3 on Si and Ge surfaces in which breaking of the HN-NN bond is observed. We suggest that the stronger bonding of hydrogen to the diamond surface is responsible.
Ladders, rings and cubes as structural motifs in three new zinc(II) azide complexes: Synthesis, spectral and structural characterization
Goher, Mohamed A.S.,Sodin, Beate,Bitschnau, Brigitte,Fuchs, Elmar C.,Mautner, Franz A.
, p. 1423 - 1431 (2008)
Three new zinc(II) azide complexes, namely {[Zn2(N3)4(py-tetrazole)2](py-tetrazole)}n (1), {[Zn2(N3)4(3-OHpy)] · 2H2O}n (2) and [Zn(N3)2(pym)]n (3), where py-tetrazole = tetrazolo[1,5-a]pyridine, 3-OHpy = 3-hydroxypyridine and pym = pyrimidine, have been synthesized by the hydrothermal methods and structurally characterized. The ligand py-tetrazole was obtained through the interaction of 2-chloropyridine with the azide ion under hydrothermal condition. The structure of 1 consists of a ladder-like arrangement of 1D double chain zinc(II) azide. In the coordination chain, each zinc atom binds di-EO azide bridges connecting another zinc atom in opposite chain, and two EO bridges, one on each side, and the fifth position is occupied by a N atom of py-tetrazole ligand. The structure of 2 features 2D sheets composed of tetranuclear zinc(II) ring and octanuclear zinc(II) ring interconnected by EO azide bridges. The 2D carrying into 3D supramolecular network by the help of several hydrogen bonding interactions. The 3-OHpy molecule acts in the tautomeric keto-form as O,O-bidentate bridging ligand. Complex 3 features distorted octahedral geometry around each zinc center, N,N′-bidentate pyrimidine ligand and EE azido bridges leading to 3D network structure. The IR spectra are measured and discussed. Complex 2 only exhibits photoluminescence properties whereas the other two complexes do not luminesce at room temperature.
Photodecomposition and photooxidation of hydrogen sulfite in aqueous solution
Fischer, Michael,Warneck, Peter
, p. 15111 - 15117 (1996)
A zinc arc lamp and a mercury lamp, respectively, were used to study the photodecomposition of HSO3- and SO32- in aqueous solutions saturated with either argon or nitrous oxide. The main products in both cases were sulfate and dithionate, which are attributed to arise from the self-reaction of SO3- radicals. Quantum yields for the formation of SO3- in argon-saturated solution based on hydrazoic acid and/or ferric oxalate actinometry were 0.19 ± 0.03 for HSO3- and 0.39 ± 0.03 for SO32-, essentially independent of S(IV) concentration. In both systems, the rate of sulfate formation rose with time at the expense of that of dithionate. This is explained by reactions of hydrogen atoms and hydrated electrons with dithionate (rate coefficient k5 ≈ 2 × 105 dm3 mol-1 s-1). N2O as a scavenger for these radicals removed the effect and raised the quantum yields to 0.25 ± 0.03 and 0.75 ± 0.04, respectively. The product ratios under these conditions were [S2O62-]/ [SO42-] = 0.43 ± 0.04 for HSO3- and 0.61 ± 0.03 for SO32-. In oxygen-saturated solutions, the photolysis of HSO3- led to a short chain reaction with sulfate and peroxodisulfate as products. The latter product was assigned to arise from the recombination of SO5- radicals. Steady state analysis of the product evolution with time gave rate coefficients for two of the reactions involved: k16(SO5- + HSO3-) = (1.2 ± 0.4) × 104 dm3 mol-1 s-1 for the main propagation reaction and k19a(HO2 + SO5-) = (1.8 ± 1.0) × 109 dm3 mol-1 s-1 for the principal termination reaction. These values agree well with recent data from radiolysis experiments.
Synthesis and structural characterization of three new 1D and 2D zinc(II) azide polymers with some pyridine and pyrazine derivative ligands
Goher, Mohamed A.S.,Bitschnau, Brigitte,Sodin, Beate,Gspan, Christian,Mautner, Franz A.
, p. 32 - 38 (2008)
Three new polymeric zinc(II) azido complexes, namely [Zn(N3)2(3-Brpy)]n (1), [Zn(N3)2(4-Etpy)]n (2) and [Zn2(N3)4(2,5-dmpyz)]n (3), where Brpy = bromopyridine, Etpy = ethylpyridine and dmpyz = dimethylpyrazine have been prepared and structurally characterized. The IR spectra of these complexes are measured and discussed. The structures of 1 and 2 are similar and feature one-dimensional zigzag chain of [Zn(N3)2]n in which each zinc atom is surrounded by double di-end on (EO) bridging azido ligands forming cyclic Zn2N2 units. Furthermore, each zinc atom links a N hetero atom of the pyridine moiety leading to ZnN5 chromophore. The geometry around the zinc center is best described as distorted trigonal bipyramid. Although complex 3 consists of the 1D chain of [Zn(N3)2]n with double di-EO azido bridges around each zinc center with almost planar Zn2N2 cyclic units, the pyrazinic moiety behaves as a bidentate bridging N,N′-ligand that binds the zinc centers across the [Zn2(N3)2]n chains extending the structure to be two-dimensional sheets. The Zn ... Zn distances within the Zn2N2 units are similar, fall within the range of 3.20-3.26 ?, and the azido ligands are asymmetric and linear within experimental error in all of these three complexes.
Highly energetic tetraazidoborate anion and boron triazide adducts
Fraenk,Habereder,Hammerl,Klapoetke,Krumm,Mayer,Noeth,Warchhold
, p. 1334 - 1340 (2001)
The first crystal structures of the highly energetic tetraazidoborate anion and boron triazide adducts with quinoline and pyrazine as well as of tetramethylpiperidinium azide have been determined. Synthesis procedures and thorough characterization by spectroscopic methods of these hazardous materials are given. Quantum chemical calculations were carried out for B(N3)4-, B(N3)3, C5H5N·B(N3)3, (N3)3B·NC4H4N· B(N3)3, and the hypothetical C3H3N3· [B(N3)3]3 at HF, MP2, and B3-LYP levels of theory. The structure of tetraazidoborate was optimized to S4 symmetry and confirmed the results obtained from the X-ray diffraction analysis. The dissociation enthalpies for the pyridine (model for quinoline) as well as for the pyrazine adduct were calculated. For pyridine-boron triazide a value of 10.0 kcal mol-1 (for pyrazine-bis(boron triazide) an average of 2.35 kcal mol-1 per BN unit) was obtained.
Preparation of a nanoscale homogeneous energetic lead azides?porous carbon hybrid with high ignition ability by: In situ synthesis
Han, Ji-Min,Liu, Jianchao,Song, Naimeng,Yan, Zhenzhan,Yang, Li
, p. 14347 - 14352 (2020)
The ever-increasing demand for miniaturized explosive systems urgently calls for better performance studies through the synthesis of novel nanoscale materials. In this work, lead azide?porous carbon hybrids (LA?PC) are synthesized by in situ carbonization and azidation of a lead-containing cross-linked gel, in which the nanoscale LA is uniformly distributed on the porous carbon skeleton. The detailed characterization has shown that such outstanding performance stems from the LA nanoscale effect and the excellent conductivity and thermal conductivity of carbon cages. Because of the favorable unique structure, the prepared composite material exhibits excellent ignition performance, and its flame sensitivity can reach 42 cm, which solves the problem of poor ignition capacity of LA on all occasions. In addition, the composite has very low electrostatic sensitivity, further improving the safety of practical application. This work makes it possible for LA to be detonated without using lead styphnate, paving a new way for improving the flame sensitivity of primary explosives.
Trapping of Br?nsted acids with a phosphorus-centered biradicaloid - synthesis of hydrogen pseudohalide addition products
Beer, Henrik,Bl?sing, Kevin,Bresien, Jonas,Chojetzki, Lukas,Schulz, Axel,Stoer, Philip,Villinger, Alexander
supporting information, p. 13655 - 13662 (2020/10/27)
The trapping of classical hydrogen pseudohalides (HX, X = pseudohalogen = CN, N3, NCO, NCS, and PCO) utilizing a phosphorus-centered cyclic biradicaloid, [P(μ-NTer)]2, is reported. These formal Br?nsted acids were generatedin situas gases and passed over the trapping reagent, the biradicaloid [P(μ-NTer)]2, leading to the formation of the addition product [HP(μ-NTer)2PX] (successful for X = CN, N3, and NCO). In addition to this direct addition reaction, a two-step procedure was also applied because we failed in isolating HPCO and HNCS addition products. This two-step process comprises the generation and isolation of the highly reactive [HP(μ-NTer)2PX]+cation as a [B(C6F5)4]?salt, followed by salt metathesis with salts such as [cat]X (cat = PPh4,n-Bu3NMe), which also gives the desired [HP(μ-NTer)2PX] product, with the exception of the reaction with the PCO?salt. In this case, proton migration was observed, finally affording the formation of a [3.1.1]-hetero-propellane-type cage compound, an OC(H)P isomer of a HPCO adduct. All discussed species were fully characterized.
HIP to be Square: Simplifying Nitridophosphate Synthesis in a Hot Isostatic Press
Mardazad, Sara,Schmidt, Peter J.,Schnick, Wolfgang,Strobel, Philipp,Wendl, Sebastian
supporting information, p. 18240 - 18243 (2020/08/21)
(Oxo)Nitridophosphates have recently been identified as a promising compound class for application in the field of solid-state lighting. Especially, the latest medium-pressure syntheses under ammonothermal conditions draw attention of the semiconductor and lighting industry on nitridophosphates. In this contribution, we introduce hot isostatic presses as a new type of medium-pressure synthetic tool, further simplifying nitridophosphate synthesis. In a second step, phosphorus nitride was replaced as starting material by red phosphorus, enabling the synthesis of Ca2PN3 as model compound, starting only from readily available compounds. Moreover, first luminescence investigations on Eu2+-doped samples reveal Ca2PN3:Eu2+ as a promising broad-band red-emitter (λem=650 nm; fwhm=1972 cm?1). Besides simple handling, the presented synthetic method offers access to large sample volumes, and the underlying reaction conditions facilitate single-crystal growth, required for excellent optical properties.
