Showing papers on "Cyclopropane published in 1970"
TL;DR: The configuration of the isomers was determined by analysis of the 1H n.m.r. spectra as mentioned in this paper, and the configuration of isomers wurde durch Analyse der 1H-NMR-Spektren bestimmt.
Abstract: Phenylmethoxycarben-pentacarbonyl-chrom(0) (1b) reagiert bei erhohter Temperatur unter Ubertragung des Carbenrestes mit trans- Crotonsaure-methylester (2) stereospezifisch zu den isomeren 2-Methoxy-3-methyl-2-phenyl-cyclopropan-carbonsaure-(1)-methylestern (3a, b). Die Konfiguration der Isomeren wurde durch Analyse der 1H-NMR-Spektren bestimmt.
Transition Metal Carbene Complexes, XIX. Synthesis of Cyclopropane Derivatives with Transition Metal Carbonyl Carbene Complexes
Phenyllmethoxycarbenepentacarbonylchromium(0) (1b) reacts on warming with trans-methyl crotonate (2) stereospecifically to give the isomeric methyl 2-methoxy-3-methyl-2-phenycyclopropane-1-carboxylates (3a, b) via transfer of the carbene ligand. The configuration of the isomers was determined by analysis of the 1H n.m.r. spectra.
104 citations
TL;DR: In this article, the Jahn-Teller distorted equilibrium geometries of the radical cations of cyclopropane and allene have been investigated using the MINDO/2 method.
65 citations
Esso1
TL;DR: The specific catalytic activities of the Group VIII noble metals have been determined for the hydrogenation of cyclopropane to propane as discussed by the authors, showing that the metal surface areas required for the determination of specific activities were measured by chemisorption of hydrogen or carbon monoxide at room temperature.
44 citations
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34 citations
TL;DR: In this paper, infrared spectra were obtained for the adsorption of isobutene, 4,4-dimethyl-1-pentene, 1-pentenes, propene, cyclopropane, and 1,3-butadiene on silica supported palladium.
33 citations
31 citations
TL;DR: It is concluded that cyclopropane and xenon each bind at the same site in solution as they do in the crystals and that the nuclear magnetic resonance shifts mainly come from interactions between the added gases and the nuclei being measured.
30 citations
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25 citations
TL;DR: The rotational Zeeman effect has been observed in cyclobutene, methylene cyclopropane, and methylenecyclobutane as mentioned in this paper, where the a and b axes are in the molecular plane.
Abstract: The rotational Zeeman effect has been observed in cyclobutene, methylene cyclopropane, and methylene cyclobutane. The molecular g values, magnetic susceptibility anisotropies, and molecular quadrupole moments were obtained and they are listed below (the a and b axes are in the molecular plane; the a axis is perpendicular to the carbon–carbon double bond in cyclobutene, and it is along the carbon–carbon double bond in methylene cyclopropane and methylene cyclobutane). The units of χ are 10−6 erg/G2·mol and the units of Qxx are 10−26 esu·cm2: CyclobuteneMethylene cyclopropaneMethylene cyclobutanegaa− 0.0516 ± 0.0007− 0.0672 ± 0.0007− 0.0320 ± 0.0008gbb− 0.0663 ± 0.0007− 0.0231 ± 0.0004− 0.0218 ± 0.0010gcc− 0.0219 ± 0.0006+ 0.0244 ± 0.0004− 0.0184 ± 0.00112χaa − χbb − χcc− 0.9 ± 0.5+ 18.3 ± 0.5− 6.4 ± 0.5− χaa + 2χbb − χcc+ 5.0 ± 0.7+ 14.0 ± 0.6+ 4.3 ± 1.7Qaa− 0.3 ± 0.6− 0.7 ± 0.5− 1.2 ± 1.1Qbb+ 1.6 ± 0.7+ 0.9 ± 0.6− 1.1 ± 2.0Qcc− 1.3 ± 1.0− 0.2 ± 0.9+ 2.3 ± 2.4 The above results, in particular the magnetic ...
TL;DR: In this paper, a comparative study was made of the cyclopropane chemisorption on pure nickel film surfaces and of the hydrogenation and hydrocracking on both the films and a reduced nickel catalyst.
TL;DR: In this article, it was shown that cyclopropane with Zeise's complex can open to propylene and displaces ethylene from the complex, and that the reaction can also open to polyethylene and propylene.
TL;DR: In this article, a Cadmium carbenoid was prepared from diethylcadmium and gem-diiodoalkane and its reactions were investigated, in which the anti-isomer was predominant contrary to the case of the corresponding reaction with Diethylzinc.
TL;DR: The rate of deuterium exchange of methane with caesium cyclohexylamide in cyclopropane at 50° is 3·1 × 10−2 that of cycloprocessible polycyclohexane, on a perhydrogen-atom basis.
Abstract: The rate of deuterium exchange of methane with caesium cyclohexylamide in cyclohexylamine at 50° is 3·1 × 10–2 that of cyclopropane, on a perhydrogen-atom basis.
TL;DR: In this article, the reaction of cyclopropane with hydrogen over a series of nickel catalysts supported on alumina and silica-alumina metal areas of the catalysts were measured by hydrogen chemisorption.
TL;DR: In this paper, 4,6-Diaryl-2-pyrones and ethyl 2-aroyl-3-arylcyclopropanecarboxylates have been prepared from 2-pyrazolines.
Abstract: 4,6-Diaryl-2-pyrones and ethyl 2-aroyl-3-arylcyclopropanecarboxylates have been prepared from 2-pyrazolines. The structure of the pyrones was established by fission with alkali. Treatment of the cyclopropane derivatives with hydrazine hydrate gave diazabicycloheptenones, from which N-acetyl and N-methyl derivatives were prepared. The 2-pyrazolines were also converted into pyrazine derivatives (III), which gave N-oxides. The pyrones could be converted into 2-pyridones, 1-methyl-2-pyridones, 2-methoxypyridines, 1-amino-2-pyridones, 2-thiopyrones, 1-methyl-2-thiopyridones, and 1-thio-2-pyrones. The structures assigned to the products were established by u.v. and i.r. spectroscopy.
TL;DR: It is demonstrated that the most probable second step in this degradative pathway is the opening of the cyclopropane ring by the direct addition of water across one of its carbon to carbon single bonds.
TL;DR: In this paper, the hydrogenation of cyclopropane on rhenium powder was investigated using the microcatalytic technique using hydrogen as the carrier gas and the reaction was pseudo first order.
TL;DR: In this article, the double-bonded double bond of the carbene has been shown to react intramolecularly in a way strongly suggestive of preliminary interaction with the double bond, and although cyclopropane formation is prevented by geometric factors, the foiled methylene determines the ultimate products.
Abstract: The carbene (1) reacts intramolecularly in a way strongly suggestive of preliminary interaction with the double bond; and, although cyclopropane formation is prevented by geometric factors, the “foiled methylene” determines the ultimate products.
Patent•
11 Jun 1970
TL;DR: In this article, the following formula is defined: (1) R1 is a cyclo-alkyl-concerning group, (2) R2 is HYDROGEN, (3) R3 is hydrogens, (4) R4 is HYdrogen, (5) R5 and R6 are the same as R2 ABOVE; (6) R6 can be taken together with the NITROGEN ATOM to attach themselves to an AZIRIDYL, PYROLIDYL or PIPER
Abstract: COMPOUNDS CHARACTERIZED BY THE FOLLOWIG FORMULA; 1-(R1-N4(-R2)-),2-R3,4-R4,6-(O2N-)BENZENE WHEREIN (1) R1 IS A CYCLOALKYL-CONTAINING GROUPING SUCH AS -(CH2)N-CH<(-(CH2)M-) IN WHICH THE CYCLOALKYL RING MAY BE SUBSTITUTED WITH C1-C3 ALKYL, C2-C3 ALKENYL, HALOGEN; M IS A POSITIVE INTEGER OF 2 TO 4 AND N IS 0 OR 1 TO 3; (2) R2 IS HYDROGEN; C1-C2 STRAIGHT OR BRANCHED CHAIN ALKYL, C2-C6 ALKENYL OR C2-C6 ALKKYNYL; C3-C8 CYCLOALKYL; C4-C10 CY CLOALKYLALKYL; C2-C12 ALKOXYALKYL; C1-C12 HALOALKYL; C1C12 CYANOALKYL; C2-C9 ACYL; C2-C6 ALKYLMERCAPTOALKL, ALKYLSUFINYLALKYL, ALKYLSULFONYLALKL; (3) R3 IS HYDROGEN, NO2, HALOGEN, C1-C6 ALKYL, C=N; AND (4) R4 IS HYDROGEN, C1-C12 ALKYL, HALOALKYL, CYCLOALKL, HALOGEN, CF3, NO2, C=N, PHENYL, SUBSTITUTED PHENYL, N=N-C6H5 SO2NR5R6 WHEREIN R5 AND R6 CAN BE THE SAME AS R2 ABOVE; IN ADDITION, R5 AND R6 WHEN TAKEN TOGETHER WITH THE NITROGEN ATOM TO WHICH THEY ARE ATTACHED FORM AN AZIRIDYL, PYROLIDYL OR PIPERIDYL RING; CH3S(O)X C2H5S(O)X C3H7S(O)X WHEREIN X IS 0, 1 OR 2; ARE BIOLOGICALLY ACTIVE COMPOUNDS ESPECIALLY USEFUR AS HERBCIDES. EXEMPLARY OF AN ESPECIALLY PREFERRED NITRATED ARYL CYCLOPROPANE DERIVATIVE IS THE COMPOUND OF THE FORMULA;; 1-(CYCLOPROPYL-CH2-N(-(CH2)2-CH3)-),2,6-DI(O2N-),4-(F3C-) BENZENE