Rearrangements wonât occur if the initially formed carbocation is the most thermodynamically stable out of all the possible isomers. For example, if you use t-butyl bromide in a Friedel-Crafts alkylation, it will not rearrange, since the t-butyl c... This page may be out of date. Save your draft before refreshing this page.
Platinum was first used for minting coins in Spanish-colonized America. Following the discovery of platinum in gold rocks, the Spaniards were unable to use it for a long time because they had no technology for processing this metal.latinum was first used for minting coins in Spanish-colonized America. Following the discovery of platinum in gold rocks, the Spaniards were unable to use it for a long time because they had no technology for processing this metal.
13 Feb, 2012 Who discovered 0. Platinum is a chemical element which is a grey-white metal at room temperature. Platinum is represented by the chemical symbol Pt and has the atomic number 78.It is an extremely stable element and is known for being the least reactive metal.hrough these experiments he was the first to recognize platinum as a new element and in 1950 encouraged The Royal Society to further investigate this metal. Spanish explorer Antonio de Ulloa is also credited with the discovery of platinum.