“…On the other hand, the strained phosphorus heterocycles have attracted considerable interest owing not only to their peculiar structures and reactivities, but also to their utilities as a ligand toward a variety of transition metal fragments [6]. Recently, we have successfully prepared a phosphorus version of single-atom peri-bridged naphthalene (naphtho [1,8-bc]phosphete), as communicated briefly [7]. Here, details of the preparation, structural properties, and some reactivities are reported for R 2 NP peri-bridged naphthalenes and their adducts with some Lewis acids.…”