lewis acid catalyst造句

例句与造句

1. Acetylation between alcohol and benzoyl oxide was carried out using znbr2 as a lewis acid catalyst in solvent - free condition . some structures were characterized by nmr and ir
   以溴化锌为催化剂，在无溶剂条件下实现了醇与苯甲酸酐的酰化反应，部分产物经nmr和ir表征。
2. Acetylation between alcohol and benzoyl oxide was carried out using znbr2 as a lewis acid catalyst in solvent - free condition . some structures were characterized by nmr and ir
   摘要以溴化锌为催化剂，在无溶剂条件下实现了醇与苯甲酸酐的酰化反应，部分产物经nmr和ir表征。
3. They were used as efficient lewis acid catalysts for esterification reactions of carboxylic acids with alcohols to afford corresponding saturated esters with 87 % ~ 98 % yields and unsaturated and tertiary ones with 90 % ~ 94 % and 54 % ~ 68 % yields , respectively
   结果表明，该有机锡化合物是合成酯的优良催化剂，产品收率高，饱和一元羧酸酯的收率为87 % ~ 98 % ，对不饱和羧酸酯和空间位阻大的叔醇酯也能得到较满意的收率，分别为90 % ~ 94 %和54 % ~ 68 % 。
4. It's difficult to find lewis acid catalyst in a sentence. 用lewis acid catalyst造句挺难的