Synthese und Kristallstruktur siebengliedriger kohlenstoffhaltiger Schwefel-Stickstoffringe / Synthesis and Crystal Structure of Seven-M embered Sulfur Nitrogen Rings Containing Carbon

The reaction of ClSCF 2 CF 2 SCl and (Me 3 SiN) 2 SR 2 proceeds with formation of the seven-membered ring compounds 4a, R = CH 3 , and 4b, R = C 2 H 5 . 4a was shown by an X-ray structure determination to contain a non-planar ring system.