Darstellung des Stibinoschwefeldiimid-Achtrings tBuSb(NSN)2SbtBu und einiger seiner Carbonylmetall-Derivate / Synthesis of the Eight-Membered Stibino-Sulfur Diimide Ring tBuSb(NSN)2SbtBu and Some of its Carbonylmetal Derivatives

Abstract

Abstract The first antimony-sulfur-nitrogen heterocycle, tBuSb(NSN)2SbtBu (1b)**, has been prepared from the reaction of tBuSbCl2 with the salt K2SN2. It forms stable chelate complexes of the type (CO)4M[tBuSb(NSN)2SbtBu] (M = Cr (3b), Mo (4b), W (5b)). The pentacarbonylchromium complex (CO)5Cr[tBuSbCl2] reacts with K2SN2 to give the mononuclear derivative (CO)5Cr[tBuSb(NSN)2SbtBu] (2b) containing the eight-membered ring 1b, whereas the corre-sponding complexes (CO)5Cr[R2SbCl] (R = tBu, Ph) are converted into binuclear sulfur diimide derivatives (CO)5Cr[R2Sb(NSN)SbR2]Cr(CO)5 (R = tBu (6b). Ph (7b)). The new stibino-sulfur diimides 1b-7b have been characterized by IR and NMR (1H and 13C) spectroscopy.