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T. S. Yuan und M. J. J. Wijnen 《Colloid and polymer science》1978,256(7):704
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Reactions of Tetrachloroaurate with Various Amines . Tetrachloroaurate reacts with aminoalcohols (L) in aqueous solution to give the complexes [AuIL2][AuIIICl4]. With t-butylamine the complex AuCl3(t-BuNH2) has been obtained, whereas from the reaction of Na[AuCl4] with n-butylamine the imine gold(I) complex ClAu(NH?CH(CH2)2Me) has been isolated. 相似文献
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C.P. Baskin C.F. Benedr R.R. Lucchese C.W. Bauschlicher H.F. Schaefer 《Journal of Molecular Structure》1976,32(1):125-131
The molecules methylberyllium fluoride and methylmagnesium fluoride have been studied using a priori electronic structure theory. Self-consistent-field wavefunctions have been computed over a double zeta basis set of contracted gaussian functions. The geometrical structure of each molecule has been predicted assuming the three heavy atoms are collinear. For CH3 BeF, the predicted C-Be and Be-F distances are 1.70 and 1.40 Å. For CH3MgF, the analogous bond distances are 2.08 Å and 1.78 Å. A number of molecular properties have been predicted including dipole moments, which are 1.75 and 2.38 debye for CH3BeF and CH3MgF. 相似文献
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W. Klötzer H. Bretschneider E. Fitz R. Reiner G. Bader 《Monatshefte für Chemie / Chemical Monthly》1970,101(4):1109-1122
Zusammenfassung Die Reaktion von N-Hydroxyharnstoff mit Crotonsäurenitril oder Allylcyanid führte zum 3-Amino-5-methyl-4,5-dihydroisoxazol, welches sich nicht zum 3-Amino-5-methylisoxazol dehydrieren ließ. Letztere Verbindung ist jedoch durch entsprechende Umsetzung von 2,3-Dibrombuttersäurenitril zugänglich. Diese Synthese wurde auf weitere ,-Dibromcarbonsäurenitrile ausgedehnt. Als Ringschlußkomponente war N-Hydroxyharnstoff dem Hydroxylamin stets weit überlegen. Als cyclischer Vertreter der Dibromcarbonsäurenitrile ergab das 1-Cyan-1,2-dibromcyclohexan — in alkalischer Lösung mit Hydroxyharnstoff umgesetzt — in anormaler Reaktion — das 3-Amino-5,6,7,7a-tetrahydro-1,2-benzisoxazol (13), anstelle des erwarteten 3-Aminotetramethylenisoxazols (14). Für das isomere 5-Aminotetramethylenisoxazol (15) wird eine verbesserte Synthese gegeben.
Herrn Dr.O. Isler zum 60. Geburtstag in Verehrung gewidmet. 相似文献
A novel synthesis of 3-aminoisoxazoles1 and 3-aminoisoxazolines starting with N-hydroxyurea
3-Amino-5-methyl-4,5-dihydroisoxazole (1) was obtained from N-hydroxyurea and crotononitrile or allyl cyanide in alkaline solution. Use of hydroxylamine, however, gave only low yields of1. Attempts on an preparative scale to dehydrogenate1 to 3-amino-5-methylisoxazole (2) failed with the free compound as well as with its benzenesulfonamide derivatives.The 3-aminoisoxazoles2, 7, 9 and12 were found to be accessible without dehydrogenation by direct cyclization of 2.3-dibromocarbonitriles with N-hydroxyurea. Again, use of hydroxylamine instead of N-hydroxyurea gave only low yields or led to mixtures of 3-amino- and 5-aminoisoxazoles.The cyclic dibromocarbonitrile 1-cyano-1.2-dibromocyclohexane reacted anomalously to give 3-amino-5,6,7,7a-tetrahydro-1,2-benzisoxazole (13) instead of the expected 3-aminotetramethyleneisoxazole (14). An improved synthesis of the isomeric 5-aminotetramethyleneisoxazole (15) is described.
Herrn Dr.O. Isler zum 60. Geburtstag in Verehrung gewidmet. 相似文献
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Synthesis of nickel complexes with a porphine-type ligand system In the presence of nickel(II) salts the bicyclic vinylogous amidine 1 is dimerized to the diamagnetic (1-amino-10,20-diaza-octahydroporphinato)nickel(II) complex 3 . The condensation proceeds through a paramagnetic octahedral nickel(II) complex 2 . Starting from 3 , the (hexadecamethyl-10,20-diaza-hexahydroporphin)nickel bis (tetrafluoroborate) 7 (a (hexaaza [16]annulene)nickel(II) complex) was prepared in two steps. This highly electrophilic compound adds methoxide ions in consecutive and reversible steps to form first the (1-methoxy-10,20-diaza-octahydroporphinato)nickel tetrafluoroborate 8 and then the [cis-1, 11-dimethoxy-decahydroporphinato (2-)]nickel 6. 6, 7 and 8 were fully characterized and interconverted by addition and elimination reactions. 相似文献
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