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2 edition of Structure of secondary nitramines - an x-ray diffraction analysis of N,N"-dinitropiperazine. found in the catalog.

Structure of secondary nitramines - an x-ray diffraction analysis of N,N"-dinitropiperazine.

William Ross Kingdon

Structure of secondary nitramines - an x-ray diffraction analysis of N,N"-dinitropiperazine.

by William Ross Kingdon

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Published .
Written in English


Edition Notes

Thesis (M.A.) -- University of Toronto, 1950.

The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL18551645M

  These salts were fully characterized by 1 H, 13 C NMR, and IR spectroscopy and elemental analysis. Additionally, the structures of the ammonium, 3,4,5‐triaminotriazolium, and biguanidinium salts were confirmed by single‐crystal X‐ray diffraction. The structure of one of the polymorphs was determined by single crystal x-ray diffraction: orthorhombic, Pbca, a = (3) A, b = (2) A, c = (5) A, Z = 16, R/sub F/ = , R/sub.

A chiral N,N′-dioxide/Co(BF 4) 2 6H 2 O complex catalytic system has been developed to efficiently catalyze the asymmetric 1,3-dipolar cycloaddition of nitrones with methyleneindolinones. The corresponding chiral multisubstituted spiroisoxazolidines with three contiguous quaternary–tertiary stereocenters were obtained in moderate to high yields with excellent dr and ee values (up to 97% Cited by: Fluorescent sensors for the detection of chemical explosives are in great demand. It is shown herein that the fluorescence of ZnL* (H2L = N,N‘-phenylene-bis-(3,5-di-tert-butylsalicylideneimine)) is quenched in solution by nitroaromatics and 2,3-dimethyl-2,3-dinitrobutane (DMNB), chemical signatures of explosives. The relationship between the structure and fluorescence of ZnL is explored, and.

The main challenge for achieving better energetic materials is to increase their density. In this paper, cocrystals of HNIW (2,4,6,8,10,hexa­nitro-2,4,6,8,10,hexa­aza­isowurtzitane, often referred to as CL) with TNT (2,4,6-tri­nitro­toluene) were synthesized using ethanol in a green chemical method. The cocrystal was formulated as C13H11N15O18 and possesses a higher density (1 Cited by: 5. Z. G. Aliev's research works with citations and 1, reads, including: Synthesis and properties of 3-azido(2H-tetrazolyl)furazan.


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Structure of secondary nitramines - an x-ray diffraction analysis of N,N"-dinitropiperazine by William Ross Kingdon Download PDF EPUB FB2

Neutron diffraction can tell the number of light elements and the exact position of them present in the structure.

Neutron Inventors Neutrons were first discovered by James Chadwick in Figure \(\PageIndex{5}\) when he showed that there were uncharged particles in. Thiosemicarbazides and their derivatives are well known for their use in biological activity and many applications in pharmaceutical and industrial fields.

The cyclization of 1-benzoyl(2-nitrophenyl)thiosemicarbazide (BNPTSC) in dimethylformamide (DMF) medium furnished N-(2-nitrophenyl)phenyl-1,3,4-oxadiazoleamine (NPPOA). The chemical structure of the above Author: A. Aparna, Ch. Sarala Devi, A. Padmaja, B. Sireesha, P. Raghavaiah.

The 1 H and 13 C NMR spectra of some N-nitramines and N-nitrosamines are reported. In general, the 1 H and 13 C NMR chemical shifts of the methylene groups of the N-nitramines are useful for the characterisation of these compounds.

For N-nitrosamines, the effects due to the shielding anisotropy of the N-nitroso group are shown in the 1 H and 13 C NMR by: THE PRINCIPLES OF X-RAY DIFFRACTION 83 Now the difference of optical path for the top and bottom wave is shown by the heavy-drawn path lying between two parts of the wave-fronts of the incident and reflected waves.

Its length is 2Nd sin 0. The path difference between reflections on File Size: 1MB. Chem Sci Trans.,6(2), X-ray analysis The title compound crystallizes in the non-standard I2/a space group of monoclinic system.

Indeed, structure has been solved and refined in C2/c centrosymmetric space group. Abstract. The vibrational (IR and Raman) spectra ofN,N-dinitromethylamine were assignments of the bands were carried out using a comparison of spectra obtained in different aggregate states, invoking the results of normal coordinate : V.

Avakyan, V. Shlyapochnikov, B. Fedorov, V. Margolin, V. Volkova. X-ray diffraction elucidated the molecular structure of both compounds. NG-N1 crystallizes in the monoclinic space group P21 with a density of g/cm³, NG-N3 in the orthorhombic space group Pnma with a density of g/cm³.

The thermal Primary Nitramines Related to Nitroglycerine. Spatial structure of the N,N'-dinitropiperazine molecule 1f. For compounds 2d,f, we observe flattening of the pipe razine ring and its transition to a half-chair conformation 2d and 2f (Fig.

X-ray diffraction (XRD) studies a monochromator can be used to further decrease the spread of wavelengths in the X-ray tensity Wavelength () White radiation Characteristic radiation: due to energy transitions in the atom K K Intense peak, nearly monochromatic X-ray sources with different for doing XRD studies Target MetalFile Size: 2MB.

Simulating the Formation of Semivolatile Primary and Secondary Organic Aerosol in a Regional Chemical Transport Model; Publications. Analysis of Energy Use and CO 2 Emissions in the U.S. Refining X-ray Absorption Fine Structure Evidence for Amorphous Zinc Sulfide as a Major Zinc Species in Suspended Matter from the Seine River.

However an X-ray diffraction study of N,N'-dinitropiperazine shows that it is not centrosymmetric in the crystal lattice. The electrical polarizabilities o f nitro c o m p o u n d s SO a n incompletely-cancelled contribution from the nitramino groups may be : G.F.

Wright. Effect of the structure of cyclic N -nitramines on the rate and mechanism of their thermolysis Article in Russian Journal of General Chemistry 77(7) July with 4 Reads. Three new dinitropyrazine compounds, namely 2,6-diamino-3,5-dinitropyrazineoxide, C 4 H 4 N 6 O 5 (1), and two of its related derivatives not having amino-groups in the ring, C 6 H 6 N 8 O 8 (2) and K + [C 8 H 3 N 6 O 5] − H 2 O (3) have been prepared, and their structures have been studied by the single crystal X-ray diffraction calculated X-ray density for 1–3 was found Cited by: The molecular and crystalline structures of three products of the reaction between 2,7-dinitro- and 2,4,7-trinitrophenanthrenequinone with nitromethane in an HMPTA solution were studied by x-ray diffraction.

Two of these products are H-bonded by: 1. The Journal of Physical Chemistry BSynchrotron X-ray Scattering Study of the Mechanism of Nanopore Generation in Nanoporous Organosilicate Thin Films Imprinted with a Reactive Six-Armed Porogen. Protein Secondary Structure Controlled with Light and Photoresponsive Surfactants.

The crystal structure was determined by single crystal X-ray diffraction. The title compound is planar (rms deviation Å), Figure 2.

All N and O carbonyl atoms are involved in hydrogen bonding, with an average HO distance of (2) Å and N—HO angles in the range (2)(2)°,Author: Víctor Kesternich, Marcia Pérez-Fehrmann, Sergio Ortíz, Felipe Verdugo, Iván Brito, Michael Bolte, A.

X-ray diffraction. The above observations from the solid-state NMR study are supported by the single crystal XRD results. In the diffraction study, the data set was collected at K, reducing molecular motions and the subsequent thermal errors, using a CCD detector which made possible the measurement of more reflections with an improved S/N Cited by: X-ray diffraction elucidated the molecular structure of both compounds.

NG-N1 crystallizes in the monoclinic space group P21 with a density of g/cm³, NG-N3 in the orthorhombic space group. The best evidence for the existence of the nitrone form is provided by x-ray diffraction examination of the monocrystals.

Synthesis, x-ray diffraction and spectral studies of the nitrone form of 3-methylnitrooximinothiolene-1,1-dioxide | SpringerLinkAuthor: L. Atovmyan, V. Tkachev, E. Atovmyan, V. Berestovitskaya, M. Timova. A thorough investigation of the nitrolysis of acylamides to N-nitramines with N 2 O 5 or fuming nitric acid in liquid CO 2 identified the N 2 O 5 – % HNO 3 mixture (3: 4) as the nitrating agent of choice (Scheme 54).

Under these conditions, a series of linear and cyclic N-nitramines, in particular N,N'-dinitropiperazine () as a Author: Sergei G. Zlotin, Igor L. Dalinger, Nina N. Makhova, Vladimir A. Tartakovsky. Nitramide was investigated by multinuclear NMR spectroscopy, X-ray-diffraction and com-putational methods.

The crystal structure analysis at various temperatures reveals a planar conformation of the molecule with a N-N bond length corresponding to a bond order between one and two. Hydrogen bonds connect the nitramide molecules side-on and Size: KB.Abstract. The molecular structure of three derivatives ofbis(2- R- 5,5- dimethyl- 3- oxo- 1- oxide pyrrolin- 1- ylidene- 3),where R =CH 3 (@#@5a @#@), C 6 H 5 (@#@5b @#@), C(CH 3) 3 (@#@5c @#@), and of the complex of 5b with copper(II)hexafluoroacetylacetonate [Cu(hfac) 2 (@#@5b @#@)] was investigated by X- ray diffraction analysis in the framework of our studies of the possible tautomeric Cited by: 2.The structure of dinitrourea (DNU) as determined by X-ray single-crystal diffraction is orthorhombic; space group: Fdd2; a = (9), b = (13), c = (4); V = Å 3, Z = 8, T = 90 K; D c = g cm – heat of formation (Δ f H° ) of DNU in the gas phase was calculated to be kJ mol –1 by using the G3MP2 method based on isodesmic reactions.