Regiochemical Control in the Substitution Reactions of Cyclotriphosphazene Derivatives with Secondary Amines by Serap Beşli and others (2018, 10.1021/acs.inorgchem.8b01620)

Inorganic Chemistry 57, 12066–12077. Quantitative phosphorus NMR measured isomer proportions; isolated products were characterized spectroscopically and crystallographically where possible. Mixed substituents produced exceptions to the usual non-geminal secondary-amine trend.