Electronic communication through the ureylene bridge: spectroscopy, structure and electrochemistry of dimethyl 1′,1′-ureylenedi(1-ferrocenecarboxylate)
摘要:
Dimethyl 1',1'-ureylenedi(1-ferrocenecarboxylate) (1) formed during the synthesis of 1-amino, 1'-ferrocenecarboxylic acid shows virtual molecular centrosymmetry. Electronic coupling between the two Fc groups through the ureylene bridge results in both Fc groups being individually oxidizable (DeltaE(1/2) much greater than 0.14 V). The possible existence of intermolecular electronic communication has discussed. The oxidation was followed by spectroelectrochernistry. The separation between the two halfwave potentials DeltaE(1/2) = 137 +/- 5 mV and the comproportionation constant K-c = 207. (C) 2004 Elsevier B.V. All rights reserved.