Search results
Results from the WOW.Com Content Network
Zinc compounds, like those of main group elements, are mostly colourless. Exceptions occur when the compound contains a coloured anion or ligand. However, zinc selenide and zinc telluride are both coloured due to charge-transfer processes. Zinc oxide turns yellow when heated due to the loss of some oxygen atoms and formation of a defect structure
See also wikt:Help:Audio pronunciations. Upload the pronunciation to Wikimedia Commons using the Upload Wizard. At the "Release rights" step, it is recommended to select "Use a different license" and then "Creative Commons CC0 Waiver" — because audio pronunciations are very short, the requirements imposed by other licenses can be problematic.
Related to the preparation of Lucas' reagent, tetrachlorozincates are often generated by combining hydrochloric acid and zinc chloride. A related anion is [Zn 2 Cl 6] 2−, in which again Zn(II) adopts a tetrahedral geometry. [2] Portion of the crystal structure of the salt hexaacetonitrilenickel(II) tetrachlorozincate ([Ni(CH 3 CN) 6] 2+ [ZnCl ...
Zinc complexes merit inclusion in the Irving-Williams series as zinc forms many complexes with the same stoichiometry as complexes of copper(II), albeit with smaller stability constants. [25] There is little similarity between cadmium and silver as compounds of silver(II) are rare and those that do exist are very strong oxidizing agents.
Zinc is an inexpensive and effective part of treatment of diarrhea among children in the developing world. Zinc becomes depleted in the body during diarrhea and replenishing zinc with a 10- to 14-day course of treatment can reduce the duration and severity of diarrheal episodes and may also prevent future episodes for as long as three months. [174]
Zinc cyanide is the inorganic compound with the formula Zn 2. It is a white solid that is used mainly for electroplating zinc but also has more specialized applications for the synthesis of organic compounds .
4, with a central zinc atom in the +2 or (II) valence state coordinated to four hydroxide groups. It has Sp3 hybridization. It is the most common of the zincate anions, and is often called just zincate. These names are also used for the salts containing that anion, such as sodium zincate Na 2 Zn(OH) 4 [2] and calcium zincate CaZn(OH) 4 ·2H 2 O [3]
The reaction is effected with zinc. The key zinc-intermediate formed is a carbenoid (iodomethyl)zinc iodide which reacts with alkenes to afford the cyclopropanated product. The rate of forming the active zinc species is increased via ultrasonication since the initial reaction occurs at the surface of the metal.