1,3-DIPHENYLCYCLOPENTADIENYL COMPLEXES OF SODIUM, INDIUM(I), THALLIUM(I) AND IRON(II) - X-RAY STRUCTURAL-ANALYSIS OF TL(C(5)H(3)PH(2))(THF)AND FE(C(5)H(3)PH(2))(2)

1,4-Diphenylcyclopentadiene (1) reacts with TlOC2H5 or NaNH2 to give t he corresponding half-sandwich complexes Na(C(5)H(3)Ph(2)) (2) and Tl( C(5)H(3)Ph(2)) (4). 2 reacts with InCl to form In(C(5)H(3)Ph(2)) (3), and 2 as well as 4 react with FeCl2 to form Fe(C(5)H(3)Ph(2))(2) (5). The H-1, C-13 NMR and mass spectra of the new compounds, as well as th e X-ray crystal structure analyses of 4 and 5, are reported and discus sed.