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.
Most of the worldâs largest retailers positioned in the top half of the list moved very little in their rankings, if at all. Wal-Mart is still, by far, the largest retailer in the world. Franceâs Carrefour is still #2. Germanyâs Metro AG overtook the United Kingdomâs Tesco chain and claimed the #3 position on the list. The top retailers in the top countries managed to maintain relative stability on the global retailing stage.