alkyl group

The results showed that dyes with strong electron-withdrawing group, asymmetrical structure and short alkyl chain substituents have better bleaching properties.

结果表明，油溶性染料分子中，取代基团的吸电性强，不对称性大，取代基含脂肪链短的，其漂白性能好。

Alkyl is an usual ortho-para directing group.

烷基通常是邻对位定位基.

The coke consisted mainly of aromatic compounds with alkyl and polycyclic aromatic hydrocarbons, and it also comprised some aromatic compounds with hydroxy group produced by further oxidation, dehydrogenation and polymerization of phenol on Lewis acid sites.

积炭物种主要为带有烷基的芳烃和多环芳烃，同时含有少量带有羟基的多环芳烃，这可能是由在L酸中心上生成的苯酚进一步氧化、脱氢和聚合形成的。

But when we mixed a new alkyl group into the alkylbenzene, we get only the meta-compound.

但在烷基苯中引入新的烷基时, 得到的是间位产物.

The other is the process in which the monomer containing "reactive group" is grafted at the end of polyolefine molecular chain, acting as a chain transfer agent, such as borane, para-methyl styrene, silane and alkyl zinc etc.

二是含反应性基团的单体接入聚烯烃分子链末端起链转移剂作用，这类链转移剂有硼烷、p-MS、硅烷和烷基锌等。