Double but independent np(O)- - -π(Nap) interactions in 5 lead to 5 (AA). The conformation of the p-YC6H4Se group in 1 changes depending on Y (Y dependence), although the effect is not strong. The Y dependence is explained on the basis of the magnitude of CT of the np(O)→π(Ar) type in 1, in addition to the np(O)- - -π(Nap) interaction. The structure around the SeO group in 1 is close to that of 5 (AA), if
8-G-1- [ p -YC 6 H 4 Se(O)] C 10 H 6 [ 1(G = H),2(G = F),3(G = Cl)和4(G)的结构= Br):Y = H,OMe,OCH 2 Ph,t- Bu,Me,Cl和NO 2 ]和(1-C 10 H 7)2 SeO(5)通过X射线晶体学分析进行研究。关于萘基(1(A)),结构1均为A,其中Se-C ArSe和O-O键分别垂直于和平行于萘平面。那些2-4也是一个。由于8-G-1-(p -YC 6 H 4 Se)C 10 H 6 [ 7(G = F),8(G = Cl)和9(G = Br)]的结构均为B,因此结果表现出乙的7 - 9变化急剧至甲的2 - 4与引入O原子的。确定1的A结构的因子-O表示的4称为O依赖性。O依赖性的起源是非键n p(O)--- π(Nap)相互作用,这导致CT从n p(O)到π(Nap),这是因为1-4中的O具有高电子富集性,原因是极性硒+