Abstract: Syntheses for the unstable symmetrical tricyclic aminophosphine 1 and its relatively stable O= P (2). SP (3), and Se= P (4) derivatives are reported. The failure of 1 to form a stable BH3 adduct contrasts with that observed for P (NMe2) 3. P (MeNCHr) 3CMe, and P (NCHzCH2) 3 and is rationali7ed in terms of electronic differences on the nitrogen which are im-posed by structural constraints. The trend in lJpsC for these compounds is ...
