Synthesis and structures of zirconium(IV) hydrogensulfato and carboxylato complexes with Kläui’s oxygen tripodal ligand

Interaction of [LOEtZrF3] (View the MathML sourceLOEt- = [Co(η5-C5H5){P(O)(OEt)2}3]−) (1) with 3 equivalents of bis(trimethylsilyl) sulfate afforded the ZrIV hydrogensulfato complex [(LOEt)2Zr2(SO4)2(HSO4)2] (2) that reacted with Et3N to give [Et3NH][LOEtZr(H2O)(SO4)2] (3). Treatment of complex 1 with 3 equivalents of trimethylsilyl acetate afforded [LOEtZr(OCOCH3)3] (4), whereas that with 1 and 2 equivalents of trimethylsilyl trimethylsiloxyacetate yielded [LOEtZrF(OCOCH2O)]2 (5) and [LOEtZr(OCOCH2OH)(OCOCH2O)]2 (6), respectively. The crystal structures of complexes 2 and 6 have been determined.