Abstract
The structures of sulfur tetrafluoride, SF 4, dimethylaminosulfur trifluoride, Me 2NSF 3, and bis(dimethylamino)sulfur difluoride, (Me 2N) 2SF 2 have been investigated using the PM3 semiempirical method. Full geometry optimizations do not agree with experimentally determined geometries. Constraining the F ax-S-F ax angle significantly improves the agreement.
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