檢視苯环的原始碼

{{Infobox person  
| 名称     =   '''苯环'''
| 图像     = 
[[File:苯环.jpg|缩略图||center|[https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=2234473226,1243533900&fm=26&gp=0.jpg 原图链接]  [https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E8%8B%AF%E7%8E%AF&hs=2&pn=1&spn=0&di=207240&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&ie=utf-8&oe=utf-8&cl=2&lm=-1&cs=2234473226%2C1243533900&os=2554013568%2C3481014563&simid=0%2C0&adpicid=0&lpn=0&ln=30&fr=ala&fm=&sme=&cg=&bdtype=0&oriquery=%E8%8B%AF%E7%8E%AF&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Fpic2.zhimg.com%2F50%2Fv2-3c9ca1e7c25bfd13659822d563a8aa81_hd.jpg%26refer%3Dhttp%3A%2F%2Fpic2.zhimg.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Djpeg%3Fsec%3D1646647271%26t%3Da4fa98388d42e1824409b7f8b56cff59&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bziti7_z%26e3Bv54AzdH3Fq7jfpt5gAzdH3Fcna8d088AzdH3Fwgfoj6AzdH3F8nna9dd8a&gsm=2&islist=&querylist= 来自搜狐网]]]
}}
'''<big>苯环</big>'''(''' benzene ring''' )，是一个[[闭合]]的[[共轭]](è)体系，六个碳原子的π[[电子云]]分布是一样的。但当苯环上有一个取代基时，取代基会改变苯环的电子分布，使分子极化。诱导效应和共轭效应都能产生这种分子极化。不仅使苯环的电子云密度增加或降低，而且还决定了苯环上各个位次电子云密度分布情况。