Reduction of 2,3-dimethyl-2,3-dinitrobutane with Zn in aqueous ethanol in the presence of NH(4)Cl affords 2,3-bis(hydroxylamino)-2,3-dimethylbutane together with 2,3-diamino-2,3-dimethylbutane and complex Zn salts. A modified procedure was developed for the synthesis of bishydroxylamine, which involves reduction in a Zn/NH(4)Cl/THF-H(2)O system.
lithium cyclopentadienyl or lithium indenyl reagents to give the cyclopentadienyl or indenylzincderivatives [RZn(mu3-N)(mu3-NH)2Ti3(eta5-C5Me5)3(mu3-N)}] (R = C5H5 (11), C9H7 (12)). Treatment of 1 with copper(I) halides in toluene at room temperature leads to the adducts [XCu(mu3-NH)3Ti3(eta5-C5Me5)3(mu3-N)}] (X = Cl (13), I (14)). Complex 13 reacts with lithium bis(trimethylsilyl)amido in toluene
Zn(NH3)2Cl2 sowie (NH4)3SnF7. Corrosion of Brass and Bronze by Ammonium Halides The intermetallic phases brass (Cu/Zn) and bronze (Cu/Sn) are corroded by ammoniumfluoride and chloride, NH4F and NH4Cl, through selective oxidation of the less noble component zinc and tin, respectively. Copper is recrystallized as cube-like or tabular single crystals under the respective influence of fluoride and chloride
氟化铵和氯化铵,NH4F 和 NH4Cl,korrodieren die intermetallischen Phasen Messing und Bronze unter selektiver Oxidation der jeweils unedleren Komponenten Zink bzw。Zinn und Rekristallisation des Kupfers unter Bildung wurfelartiger oder tafeliger Einkristalle (Fluorid bzw. Chlorid)。Zink bzw。Zinn werden in Komplexverbindungen eingebaut;nachgewiesen wurden durch Rontgen-Pulverdiffraktometrie (NH4)ZnF3, (NH4)2ZnF4
作者:V. I. Ovcharenko、S. V. Fokin、G. V. Romanenko、I. V. Korobkov、P. Rey
DOI:10.1007/bf02496404
日期:1999.8
Reduction of 2,3-dimethyl-2,3-dinitrobutane with Zn in aqueous ethanol in the presence of NH(4)Cl affords 2,3-bis(hydroxylamino)-2,3-dimethylbutane together with 2,3-diamino-2,3-dimethylbutane and complex Zn salts. A modified procedure was developed for the synthesis of bishydroxylamine, which involves reduction in a Zn/NH(4)Cl/THF-H(2)O system.