OLE-2-THIONE-4,5-DITHIOLATO)DIARYLANTIMONATE(1-)], [AR2SB(DMIT)2](-),COMPLEXES - CRYSTAL-STRUCTURES OF [NET4][AR2SB(DMIT)(2)] (AR=PH OR P-TOLYL)

The ionic complexes [Q][Ph2Sb(dmit)(2)] (4; Q = NEt4 or 1,4-Me-2-pyrid inium) and [Net(4)][(p-tolyl)(2)Sb(dmit)(2)] (5) have been prepared fr om [Q](2)[Zn(dmit)(2)] and Ar2SbCl3 in the presence of KSCN (H-2-dmit = 4,5-dimercapto-1,3-dithiole-2-thione). As shown by X-ray crystallogr aphy for 4 (Q = NEt4) and 5, these complexes contain distorted octahed ral anions with cis-aryl groups : the C-Sb-C angles in 4 (Q = NEt4) an d 5 are 93.1(2) and 95.3(5)degrees, respectively. The dmit chelates ar e unsymmetrically bonded to antimony in both 4 (Q = NEt4) and 5 with t he longer bonds trans to the aryl groups (for both compounds, the Sb-S bond lengths are in the ranges, 2.614 to 2.636 and 2.530-2.550 Angstr om). (C) 1997 Elsevier Science Ltd.