自从Kier 和Hall 提出价分子连接性指数以来,在应用方面有了很大的发展。价分子连接性的提出使有可能获得杂原子和不饱和结构的信息,并可能把这些分子间性质上的差异关联起来。最初的δ~v 值最初,对价原子连接性值δ是通过计算价电子而不是通过键合的氢数来决定的。价分子 Since Kier and Hall proposed the valance molecular connectivity index, there has been a great development in application. The proposal of valence molecular connectivity makes it possible to obtain information on heteroatoms and unsaturated structures and may correlate the qualitative differences between these molecules. Initial δ ~ v values ​​Initially, the value of the valence atom connectivity, δ, is determined by calculating the valence electron rather than by the number of bonded hydrogens. Price numerator