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利用改进的方法合成了六种具有立体效应的氯化四（邻烷基苯基）卟啉合铁（Ｔ（ｏ－Ｒ）ＰＰＦｅＣｌ，Ｒ＝甲基，乙基，正丙基，正丁基，异丙基，叔丁基），其中五种是新合成的化合物．这些铁卟啉的红外光谱显示出外卟啉环上取代基的立体效应对铁－氯键没有影响．与其它取代四苯基铁卟啉比较，氯化四（邻叔丁基苯基）卟啉合铁的可见吸收光谱发生了红移．这说明叔丁基大的立体作用，使四苯基卟啉环相对扁平．邻烷基苯甲醛的取代基的立体效应严重地降低了邻烷基苯甲醛与吡咯的缩合以及相应卟啉的金属化反应．
Six modified iron tetrakis (ortho-alkylphenyl) porphyrins (T (o-R) PPFeCl with R = methyl, ethyl, n-propyl, n-butyl , Isopropyl, t-butyl), of which five are newly synthesized compounds. The IR spectra of these iron porphyrins show that the steric effect of the substituents on the epi-porphyrin ring has no effect on the iron-chlorine bond. The visible absorption spectra of tetrakis (o-tert-butylphenyl) porphyrin iron have a red shift compared with other substituted tetraphenylferroporphyrins. This shows that t-butyl big stereo effect, the tetraphenyl porphyrin ring relatively flat. The steric effect of the substituents of the ortho-alkylbenzaldehyde severely reduces the condensation of o-alkylbenzaldehyde with pyrrole and the metallization of the corresponding porphyrin.