Covalent adducts from 1,3-disubstituted pyridinium salts and piperidine
作者:F. Micheletti Moracci、B. Di Rienzo、S. Tortorella、F. Liberators
DOI:10.1016/s0040-4020(01)93695-6
日期:1980.1
isolated from the reactionbetween piperidine and pyridiniumsalts 1a-f. 3a-f are stable both in the solid state and in apolar solvents, whereas their fast dissociation back to piperidine and pyridinium ions occurs in aqueous solution. The latter, in the alkaline environment produced by the amine, yields the correspondent pseudobases, which are key intermediates of the subsequent reactions. For instance
Aqueous, alkaline, cyanide-free bath for the galvanic deposition of zinc alloy coatings
申请人:Brunner Heiko
公开号:US20100155257A1
公开(公告)日:2010-06-24
An aqueous, alkaline, cyanide-free electrolyte bath for deposition of zinc alloy layers on substrate surfaces is described, which contains cationic pyridinium compounds as brighteners and polyamines as complexing agents. The electrolyte bath is suitable for electroplating bright and even zinc alloy coatings.
Wässriges alkalisches cyanidfreies Bad zur galvanischen Abscheidung von Zink- und Zinklegierungsüberzügen
申请人:ATOTECH Deutschland GmbH
公开号:EP1870495A1
公开(公告)日:2007-12-26
Beschrieben wird ein wässriges alkalisches cyanidfreies Elektrolytbad zur Abscheidung von Zink- und Zinklegierungsschichten auf Substratoberflächen, das als Additive kationische heteroaromatische Stickstoffverbindungen als Glanzbildner enthält.