SYNTHESIS, CHARACTERIZATION AND CRYSTAL-STRUCTURE OF COMPLEXES OF THORIUM(IV) NITRATE WITH N,N,N',N'-TETRAPHENYL-3,6-DIOXAOCTANEDIAMIDE

The solid powder and crystal complexes of thorium(IV) nitrate with N,N ,N',N'-tetraphenyl-3,6-dioxaoctanediamide (L), having the formulae [Th (NO3)4(L)] and [Th(NO3)4(L)].2MeCN, respectively, have been prepared a nd characterized by elemental analysis, molar conductance, IR and H-1 NMR spectra. The latter complex crystallizes in the monoclinic space g roup P2(1)/c, with a = 14.156(3). b = 14.595(2), c = 20.713(3) angstro m, beta = 97.27(1)-degrees and Z = 4. The final R = 0.0376 for 1857 in dependent observed [I greater-than-or-equal-to 3sigma(I)] reflections. The thorium atom is twelve-co-ordinated by oxygen atoms, eight from f our bidentate nitrate groups and four from L, forming a distorted icos ahedron. The compound L acts as a tetradentate ligand forming a half-r ing co-ordination structure. The Th-O bonds average 2.515(5) (carbonyl oxygen), 2.565(5) (nitrate oxygen) and 2.653(5) angstrom (ether oxyge n).