Übergangsmetallkomplexe mit Schwefelliganden LIV. [Fe(CO) 2(′S 4′)] als synthon für den gezielten aufbau mehrkerniger heterometall-schwefel-zentren mit CO-bindungsstellen. Synthese, eigenschaften und röntgenstrukturanalyse von [Fe(CO) 2(μ-′S 4′){M(CO) 5} n] ( n = 1: M = Cr, Mo, W; n = 2: M = W; ′S 4′ 2− = 2,3,8,9-Dibenzo-1,4,7,10-tetrathiadecan(2 - ))

Abstract

Diastereoselective Lewis acid base reactions between [Fe(CO) 2(′S 4′)] ( 1) and [M(CO) 5THF] (M = Cr, Mo, W) yield bi- and trinuclear heterometallic complexes [Fe(CO) 2(μ-′S 4′)i{M(CO) 5}] (M = Cr, 2a; Mo, 2b; W, 2c) and [Fe(CO) 2(μ-′S 4′) {W(CO) 5} 2] ( 3) respectively. 2a also is formed by the reaction of Li 2[μ-′S 4′{Cr(CO) 4} 2] with FeCl 2·4H 2O. X-Ray structure analyses of 2a and 3 show the M(CO) 5 fragments to coordinate the thiolato-S atoms of [Fe(CO) 2(′S 4′)] in an exo manner. The NMR spectra reveal this configuration is preserved in solution.