The spiropyrans with a nitro group at the benzopyran moiety showed reverse photochromic behavior, others were normal photochromic compounds.
在苯并吡喃部分含有硝基的螺吡喃显示出逆光致变色行为,其它的则为普通光致变色化合物。
Nitro compound: Any of a class of chemical compounds in which the nitro group (-no2) forms part of the molecular structure.
硝基化合物:分子结构中含有硝基(-NO2)的任何一类化合物。
Complete transformation of the nitro group to chloropicrin takes place in the reaction.
硝基在反应中完全转变成氯苦。