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On reaction of (C 5 H 5 )MoCl 2  (1) with equivalent amounts of Na 2 S 2  in ethanol, (C 5 H 5 ) 2 MoS 2  (2) is formed together with (C 5 H 5 ) 2 MoS 4  (3) and separated from 3 by vacuum sublimation. The more stable tetrasulfide 3 is obtained as the main product from 1 or 2 with excess Na 2 S 2  and also from 2 or (C 5 H 5 ) 2 Mo(SH) 2  (4) with S 8  in chloroform. A threemembered ring chelate structure involving side-on bonded S 2  2-  ligands and pseudotetrahedrally coordinated Mo +4  central atoms is postulated for 2.

zeitschrift für naturforschung b

Metallorganische Polychalkogenid-Chelate, X [1]. Disulfidobis(η 5  -cyclopentadienyl)molybdän(IV), ein pseudotetraedrisches Disulfid-Chelat / Organometallic Polychalcogenide Chelates, X [1]. Disulfidobis(η 5  -cyclopentadienyl)molybdenum(IV), a Pseudotetrahedral Disulfide Chelate