The most important application of diazo coupling reactions is electrophilic aromatic substitution of activated benzene derivatives by diazonium electrophiles. The products of such reactions are highly colored aromatic azo compounds that find use as synthetic dyestuffs, commonly referred to as azo dyes.
The biggest IT vendors in the world by revenue. Research and advisory company, Gartner, has published the top global 100 vendors in IT in 2016 based on their revenue across IT and component market segments. Apple is listed as the largest vendor with more than $218 billion in IT revenue â approximately $79 billion larger than second placed Samsung Vendor Group, while Google is third.
Chinese vendor Huawei, which aims to become the world's largest smartphone maker within four years, finished third with an estimated 11.4 percent market share. Samsung is traditionally the world's largest smartphone maker, as it sells millions of inexpensive smartphones alongside its flagship devices, so this would normally be no surprise. However, after Samsung recalled the Galaxy Note7 due to defective batteries, Apple overtook its South Korean rival in the fourth quarter.