SYNTHESIS AND CRYSTAL-STRUCTURE OF A NEW POLYNUCLEAR LANTHANUM PICRATE COMPLEX WITH TRANS-1,4-DITHIANE-1,4-DIOXIDE

A new polynuclear lanthanum picrate complex [La(pic)(2)(TDTD)(15)(H2O) (3)]. pic (pic = picrate, TDTD = trans-1,4-dithiane-1,4-dioxide) was o btained by reacting hydrated lanthanum picrate and TDTD in water. The compound was characterized by IR spectra and X-ray analysis. It crysta llizes in space group P (1) over bar with a = 12.267(2), b = 13.012(3) , c = 13.888(3) Angstrom, alpha = 109.34(2), beta = 115.97(3), gamma = 83.93(3)degrees, V = 1878.6(9) Angstrom(3). The crystal structure con sists of polymeric chains where the TDTD ligands act as bridges betwee n three neighbouring lanthanum ions which are ten coordinated, the coo rdination sphere containing two bidentate picrate, three water molecul es and three oxygens of the three bridging TDTD ligands. (C) 1998 Else vier Science S.A. All rights reserved.