Synthesis and dihydrogen phosphate binding properties of pyrrole containing ansa-ferrocenes

Pyrrole-substituted α,ω-diamines varying in length and number of heteroatoms between the amine functionalities were reacted with 1,1′-ferrocenedimethanol to form ansa-ferrocenes. 1H-NMR binding studies in a 2% dimethylsulfoxide-d6 solution of dichloromethane-d2 establish a correlation between the affinity for tetrabutylammonium dihydrogen phosphate and the number of heteroatoms in the diamine. Further support for this conclusion came from electrochemical analyses.