The Synthesis, Solid State Conductivity and X-Ray Crystal Structure of [Fe(Eta(5)-C5h5)(E-Eta(5)-C5h4-Ch=Ch-9-C16h9)][1,4-{(Cn)(2)C=}(2)C6h4]

The new compounds [Fe(eta(5)-C5H5)(E-eta(5)-C5H4-CH=CH-9-C16H9)], [Fe(eta(5)-C5H4)(E-eta(5)-C5H4-CH=CH-9-C16H9)][(CN)(2)C= C(CN)(2)] and [Fe(eta(5)-C5H5)(E-eta(5)C(5)H(4)-CH=CH-9-C16H9)][1,4-{(CN)(2)C=}(2)C6H4] have been synthesized and characterized by their mass, IR and H-1 NMR spectra. The crystal structure of the latter compound contains 1,2-ferrocenyl-pyrenyl-ethene and 1,4-{(CN)(2)C=}(2)C6H4 (TCNQ) molecules alternating in stacks characteristic of pi-pi* electron donor-acceptor complexes. The pyrene and TCNQ moieties are nearly parallel, angle of tilt 5.3 degrees, with interplanar separations of 3.33 and 3.42 Angstrom. Microwave cavity perturbation measurements have been used to show that this solid behaves as a normal semi-conductor below 176 K. (C) 1998 Elsevier Science S.A. All rights reserved.