Results 171 to 180 of about 97,714 (213)
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The Journal of Chemical Physics, 1993
The heat of formation of NCO has been determined rigorously by state-of-the-art ab initio electronic structure methods, including Mo/ller–Plesset perturbation theory from second through fifth order (MP2–MP5) and coupled-cluster and Brueckner methods incorporating various degrees of excitation [CCSD, CCSD(T), BD, BD(T), and BD(TQ)].
Allan L. L. East, Wesley D. Allen
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The heat of formation of NCO has been determined rigorously by state-of-the-art ab initio electronic structure methods, including Mo/ller–Plesset perturbation theory from second through fifth order (MP2–MP5) and coupled-cluster and Brueckner methods incorporating various degrees of excitation [CCSD, CCSD(T), BD, BD(T), and BD(TQ)].
Allan L. L. East, Wesley D. Allen
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The vibrational spectra and structure of Si(NCO)4 and Ge(NCO)4
Spectrochimica Acta, 1961Abstract Raman spectra (with polarizations) and infrared absorption from 80 to 4000 cm −1 are reported for Si(NCO) 4 and Ge(NCO) 4 . The spectra of both compounds are surprisingly simple and indicate high symmetry. For Si(NCO) 4 the data fit a tetrahedral model fairly well.
Foil A Miller, Gerald L Carlson
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NCO‐prepolymere aus diisocyanaten mit unterschiedlich reaktiven NCO‐gruppen
Die Angewandte Makromolekulare Chemie, 1984AbstractEs werden zwei Verfahren zur Bestimmung des Verhältnisses der Geschwindigkeitskonstanten γ = k1/k2 bei der Urethanbildung aus Diisocyanaten mit unterschiedlich reaktiven NCO‐Gruppen beschrieben. Bei der Umsetzung mit einem großen Überschuß an n‐Butanol erfolgt sowohl bei 1,6‐Hexamethylendiisocyanat (HDI) als auch bei 3‐Isocyanatomethyl‐3,5,5 ...
O. Lorenz, H. Decker, G. Rose
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The infrared, Raman and ultraviolet spectra of P(NCO)3 and PO(NCO)3
Spectrochimica Acta, 1962Abstract The infrared spectrum from 120 to 5000 cm −1 and the Raman spectrum with polarizations were obtained for phosphorus (III) isocyanate and phosphoryl (V) isocyanate. They demonstrate that both molecules have at least a C 3 -axis of symmetry. For P(NCO) 3 , D 3 h symmetry (planar trigonal structure) may be definitely eliminated. C 3 h
F MILLER, W BAER
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A shock tube study of H+HNCO→H2+NCO and the thermal decomposition of NCO
Symposium (International) on Combustion, 1996The reaction of atomic hydrogen with isocyanic acid (HNCO) to produce molecular hydrogen and the NCO radical, H+HNCO→H2+NCO (3a) and the thermal dissociation reaction NCO+Ar→N+CO+Ar (4) have been studied in shock-heated mixtures of HNCO dilute in argon. Quantitative time histories of the NCO radical were measured behind the shock waves using cw, narrow-
John D. Mertens, Ronald K. Hanson
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Kinetics of NCO + hydrocarbon reactions
Chemical Physics Letters, 1994Abstract The kinetics of NCO reactions with hydrocarbon molecules were investigated using time-resolved infrared diode laser absorption spectroscopy. NCO was probed at 1905.6 cm −1 , and HNCO reaction products were probed at 2280.1 cm −1 . Rate constants at 296 K were measured to be −14 , (7.04 ± 1.20) × 10 −14 , (2.29 ± 0.13) × 10 −13 , (6.13 ± 0 ...
Joonbum Park, John F. Hershberger
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2017
The Configurable Logic Cell (CLC) is a module designed by Microchip that provides basic configurable logic for PIC® microcontrollers. This includes the basic gates and D and JK flip-flops and D and SR latches. This means that with the CLC, you can combine logic internal and external to the chip to produce a particular function.
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The Configurable Logic Cell (CLC) is a module designed by Microchip that provides basic configurable logic for PIC® microcontrollers. This includes the basic gates and D and JK flip-flops and D and SR latches. This means that with the CLC, you can combine logic internal and external to the chip to produce a particular function.
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The Effect of NCO Content in Polyurethane Foam for Automotive Instrument Panel
International Journal of Precision Engineering and Manufacturing, 2023Pilho Huh
exaly