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

Pyrrole-substituted alpha,omega -diamines varying in length and number of h eteroatoms between the amine functionalities were reacted with 1,1'-ferroce nedimethanol to form ansa-ferrocenes. H-1-NMR binding studies in a 2% dimet hylsulfoxide-d(6) solution of dichloromethane-d(2) establish a correlation between the affinity for tetrabutylammonium dihydrogen phosphate and the nu mber of heteroatoms in the diamine. Further support for this conclusion cam e from electrochemical analyses. (C) 2001 Elsevier Science B.V. All rights reserved.