Results 201 to 210 of about 4,349 (248)
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Journal of Hazardous Materials, 2009
For many years cyanamide (CAS no. 420-04-2) was not commercially available due to its unstable nature. Since about 1965 the former "Süddeutsche Kalkstickstoffwerke AG" (current name: AlzChem Trostberg GmbH) developed a special stabilizing system. It was to be investigated to which Class (e.g. "Corrosive Substances", Class 8) or Division (e.g.
Thomas Guethner
exaly +4 more sources
For many years cyanamide (CAS no. 420-04-2) was not commercially available due to its unstable nature. Since about 1965 the former "Süddeutsche Kalkstickstoffwerke AG" (current name: AlzChem Trostberg GmbH) developed a special stabilizing system. It was to be investigated to which Class (e.g. "Corrosive Substances", Class 8) or Division (e.g.
Thomas Guethner
exaly +4 more sources
The Cyanamide Moiety, Synthesis and Reactivity
Synthesis, 2012AbstractReview: ca. 120 refs.
Giovanni Maestri, Max Malacria
exaly +6 more sources
Polycyclotrimerisation of cyanamides
Russian Chemical Reviews, 1989The results of studies in the field of the synthesis of polymers with a network structure by the polycyclotrimerisation of cyanamides and oligomers containing cyanamide groups are surveyed and analysed. The prospects for the use of polymers based on compounds containing cyanamide groups in the preparation of various thermostable materials are discussed.
A E Chesnokova, V A Pankratov
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Nature, 1944
THE constitution of cyanamide, since its first synthesis in 1851, has been the subject of a very large number of publications. Whereas the chemical properties of this substance point to the structures NH2CN and NH : C : NH, its physical properties are held1 to favour the former.
H. A. Rees, L. Hunter
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THE constitution of cyanamide, since its first synthesis in 1851, has been the subject of a very large number of publications. Whereas the chemical properties of this substance point to the structures NH2CN and NH : C : NH, its physical properties are held1 to favour the former.
H. A. Rees, L. Hunter
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ChemInform Abstract: THE DIMERS OF CYANAMIDE
Chemischer Informationsdienst, 1983Abstract Ab initio calculations have been performed on various dimeric forms of cyanamide. The “nondissociative” dimerization of cyanamide leads to cyclic molecules all of which are unstable with respect to cyanamide. However, the molecules produced by “dissociative” dimerization are stable relative to cyanamide. Dicyandiamide is found to be the most
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Determination of Calcium Cyanamide in Crude Calcium Cyanamide
1981Abstract : A rapid method of analysis for the assay of crude calcium cyanamide is proposed for the monitoring of calcium cyanamide in the nitroguanidine continuous process line. The proposed method consists of (1) micomilling the crude material, (2) extracting the milled material with a sodium acetate/acetic acid buffer, and (3) determining the ...
Charles Ribaudo, Francis X Murphy
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Lattice Vibrations of Molecular Crystals. II. Cyanamide and Cyanamide-d2
The Journal of Chemical Physics, 1968The far-infrared spectra (33–500 cm−1) of crystalline cyanamide (NH2CN) and cyanamide-d2 have been recorded with polyethylene and silicon sample support plates. The laser Raman spectra have also been recorded from 40–1600 cm−1 for both molecules. No evidence was found for the inversion doubling and resultant low-frequency components of the NH2 and ND2 ...
F. G. Baglin, J. R. Durig, M. Walker
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Vibrational Spectra and the Inversion Phenomenon in Cyanamide and Deuterated Cyanamide
The Journal of Chemical Physics, 1963The infrared and Raman spectra of H2NCN and D2NCN have been examined in the liquid state in the region of 2.5 to 35 μ. Polarization data imply a planar configuration, but the experimental data for the region beyond 12 μ are inconsistent with this. The observed product rule ratio for the symmetric N–H stretch, NH2 deformation, N–C and C≡N stretches are ...
Farrell B. Brown, William H. Fletcher
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The cyanamide–isocyanamide rearrangement
The Journal of Chemical Physics, 1980A b initio self-consistent field (SCF) and correlated SCEP calculations have been used to study the relative energies and structures of cyanamide, isocyanamide, and the transition state for the rearrangement reaction. Isocyanamide is found to be 53 kcal less stable than cyanamide, larger than the typical isocyanide–cyanide energy difference ...
Mark A. Vincent, Clifford E. Dykstra
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Copper-Catalyzed Alkenylation of Cyanamides
Organic Letters, 2017An efficient procedure for the copper-catalyzed cross-coupling between a broad range of cyanamides and iodoalkenes is reported. Upon reaction with catalytic amounts of copper(I) iodide and 2,2'-bisimidazole in the presence of cesium carbonate in DMF at 80 °C, a fast, regioselective, and stereoretentive cross-coupling occurs.
Antoine Nitelet +3 more
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