ChemInform Abstract: BIS‐(DIALKYLAMINO)‐SCHWEFELDIFLUORIDE

Markovskii, L. N.; Pashinnik, V. E.; Kirsanova, N. A.

doi:10.1002/chin.197514256

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1999

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“…Reports of pyrrole-, imidazole-, pyrazole-, and triazolesulfur trifluorides or -sulfur difluorides in which the nitrogen is part of a planar, aromatic system were unreported in the literature at the outset of our work. Amino sulfur trifluorides are generally accessible through reaction of SF 4 with N-silylated amines; excess amine and higher reaction temperatures lead to exchange of the second sulfur-bonded fluorine atom with formation of (R 2 N) 2 SF 2 . , …”

Section: Resultsmentioning

confidence: 99%

Syntheses and Structures of Bis(azole)difluorosulfuranes

et al. 1999

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Bis(imidazole)sulfur difluoride (4), bis(pyrazole)sulfur difluoride (6), and bis(1,2,4-triazole)sulfur difluoride (8) are formed in the reactions of N-(trimethylsilyl)imidazole, N-(trimethylsilyl)pyrazole, and 1-(trimethylsilyl)-1,2,4-triazole with SF(4), in high yield. The ring systems in these three molecules occupy equatorial positions in the pseudo-trigonal-bipyramidal coordination sphere of the central sulfur atoms. The angles between the planes of the ring substituents and the FSF axis for 4 and 6 are in the range 23.6-35.3 degrees, and in 8 the triazole rings are almost parallel (deviation 1.7 degrees ). The interaction between the heterocyclic substituents and the sulfur centers and their influence on the axial and equatorial bonds is discussed.

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Section: Resultsmentioning

confidence: 99%