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For diamony(III)-trisdithiolates two constitutions (bicyclic B or two bridged monocycles C) are possible. Two synthetical paths to three examples Sb 2 (XS 2 ) 3  with X = CH 2 CH 2  (1), CH 2 CH 2 - O - CH 2 CH 2  (2), CH 2 CH 2 - S - CH 2 CH 2  (3) are reported.  13 C NMR spectra in CDCl 3  solution show the constitution C for 2 and 3, and a possible equilibrium C ⇌ 4:1) for 1. This corresponds to the result of a crystal structure analysis (R = 0.027). The constitution C found in solid 1 exhibits expanded coordination polyhedra around the two antimony atoms which indicate a starting point for rearrangement into the constitution B. The two bridged 5-membered rings have different conformations: envelope and half-chair.

zeitschrift für naturforschung b

Über Antimon-haltige Heterocyclen, V  Antimon(III)-dithiolate mit verbrückten 5-und 8-Ringen/On Heterocyclic Systems Containing Antimony, V  Antimony(III) Dithiolates with Bridged 5-and 8 -Membered Rings