“…Synthesis. 1 3 ,1 7 ,7 3 ,7 7 -Tetrakis(2′,4′,6′-triisopropylphenyl)-3,3,5,5,9,9,11,11-octamethyl-1,7(1,5)-bis(1,5-diaza-3,7-diphosphacyclooctana)-2,4,6,8,10,12(1,4)-hexabenzenacyclododecaphane (1), 1 3 ,1 7 ,7 3 ,7 7 -Tetrakis(mesityl)-3,3,5,5,9,9,11,11octamethyl-1,7(1,5)-bis(1,5-diaza-3,7-diphosphacyclooctana)-2,4,6,8,10,12 (1,4)-hexabenzenacyclododecaphane (2) 29 and 2,4,6triisopropylphenylphosphine (4) 31 were prepared according to procedures reported previously. 1,4-Bis[R-(4′-aminophenyl)isopropyl]benzene (3) was purchased from TCI Europe NV.…”