Tác giả: Ian C. Rivera

The history of child labor in America is long and, in some cases, unsavory. It dates back to the founding of the United States. Traditionally, most children, except for the privileged few, had always …

In the last 10a E ’15 years the discovery of catalytic cycloalumination, cyclomagnesiation, and ethylmagnesiation reactions of olefins, dienes and allenes with the aid of alkyl and halogen alkyl Al a …