Reaction of 1-{(pentamethylcyclopentadienyl)(dicarbonyl)ferrio}-2-(2,4,6-tri-tert-butylphenyl)diphosphene with 1,2,4-triazoline-3,5-diones: formations and structures of the first 1,2-diaza-3,4-diphosphetidines and E,E-1,7-dioxa-4,5,10,11-tetraaza-3,4,8,9-tetraphosphacyclododeca-5,11-diene
Abstract
Reaction of [(η5-C5Me5)(CO)2Fe–PP–MeS*]1(Mes*= 2,4,6-But3C6H2) with 1,2,4-triazoline-3,5-diones [[graphic omitted](O)]2(a: R = Ph; b: R = 4-EtOC6H4) in benzene at ambient temperature affords the first 1,2-diaza-3,4-diphosphetidines as part of the bicyclic compounds 4, whereas in diethyl ether solution the twelve-membered macrocycle 5 is obtained.