1,3‐Di‐
tert
‐butyl‐2,2,4,4‐tetrahalocyclodisilazanes ‐ Synthesis, X‐ray Crystal and Gas‐Phase Structures
摘要:
AbstractThe syntheses of 1,3‐di‐tert‐butyl‐2,2,4,4‐tetrachlorocyclodisilazane (3) and of di‐tert‐butyl‐2,2,4,4‐tetrafluorocyclodisilazane (4) are reported. The X‐ray crystal structure of 3 and the electron‐diffraction gas‐phase structure of 4 have been determined. Both cyclodisilazanes possess planar four‐membered rings and nearly planar configurations at the nitrogen atoms. The Si‐N bond lengths are 171.1(1) pm and 170.6(3) pm and the Si ⃛Si transannular distances 245.0(1) and 241.3(13) pm in 3 and 4, respectively.