Sulfur trifluoride

Sulfur trifluoride
Names
	Other names sulfur(III) fluoride; trifluorosulfur radical
Identifiers
CAS Number	30937-38-3 ;
Properties
Chemical formula	F3S
Molar mass	89.06 g·mol−1
Related compounds
Related compounds	SF2, SF4, SF6, S2F10
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Sulfur trifluoride is an inorganic chemical compound composed of one atom of sulfur and three atoms of fluorine.[1] It has the chemical formula SF₃, and is 64% fluorine and 36% sulfur by mass. Sulfur trifluoride is not a stable molecule: it has an unpaired electron and is thus a radical.[2] While some radicals are stable, SF₃ is not.[3]

Structure

Sulfur trifluoride is composed of one sulfur atom with three fluorine atoms surrounding it. Each fluorine is attached to the sulfur by a single covalent bond.[4] The SF₃ molecule is very short-lived and its structure has not been determined experimentally. It is calculated to adopt a butterfly-shaped molecular geometry, belonging to the C_s point group.[5][6]

Ligand

SF₃ is known as a ligand in the compound (Et₃P)2Ir(CO)(Cl)(F)(SF₃). Ir(CO)₃(SF₃) is also possibly stable. But other third row transition elements do not make stable complexes with SF₃, instead they dissociate SF₂ and form a -F complex instead.[7]

References

http://www.caslab.com/Sulfur_trifluoride_CAS_30937-38-3
Morton, J. R.; Preston, K. F.; Strach, S. J. (1978). "The EPR spectrum of SF3 trapped in SF3BF4 crystals". The Journal of Chemical Physics. 69 (4): 1392. doi:10.1063/1.436766.
Deng, Jianming; Wang, Chaoyang; Li, Qian-shu; Xie, Yaoming; King, R. Bruce; Schaefer, Henry F. (2011). "Trifluorosulfane Ligand as an Analogue of the Nitrosyl Ligand: Highly Exothermic Fluorine Transfer Reactions from Sulfur to Metal in the Chemistry of SF3Metal Carbonyls of the First Row Transition Metals". Inorganic Chemistry. 50 (7): 2824–35. doi:10.1021/ic101994k. PMID 21366337.
http://webbook.nist.gov/cgi/cbook.cgi?ID=C30937383&Mask=20
Irikura, Karl K. (1995). "Structure and thermochemistry of sulfur fluorides SFn (n=1–5) and their ions SF+n (n=1–5)". The Journal of Chemical Physics. 102 (13): 5357–5367. doi:10.1063/1.469263.
Woon, David E.; Dunning, Thom H. (2009). "Theory of Hypervalency: Recoupled Pair Bonding in SFn(n= 1−6)". The Journal of Physical Chemistry A. 113 (27): 7915–26. doi:10.1021/jp901949b. PMID 19499905.
Gao, Xiaozhen; Li, Nan; King, R. Bruce (December 2014). "Formation of Difluorosulfane Complexes of the Third Row Transition Metals by Sulfur-to-Metal Fluorine Migration in Trifluorosulfane Metal Complexes: The Anomaly of Trifluorosulfane Iridium Tricarbonyl". Inorganic Chemistry. 53 (23): 12635–12642. doi:10.1021/ic502375q. PMID 25397720.

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[1] ttp://www.caslab.com/Sulfur_trifluoride_CAS_30937-38-3

[2] Morton, J. R.; Preston, K. F.; Strach, S. J. (1978). "The EPR spectrum of SF3 trapped in SF3BF4 crystals". The Journal of Chemical Physics. 69 (4): 1392. doi:10.1063/1.436766.

[3] Deng, Jianming; Wang, Chaoyang; Li, Qian-shu; Xie, Yaoming; King, R. Bruce; Schaefer, Henry F. (2011). "Trifluorosulfane Ligand as an Analogue of the Nitrosyl Ligand: Highly Exothermic Fluorine Transfer Reactions from Sulfur to Metal in the Chemistry of SF3Metal Carbonyls of the First Row Transition Metals". Inorganic Chemistry. 50 (7): 2824–35. doi:10.1021/ic101994k. PMID 21366337.

[4] ttp://webbook.nist.gov/cgi/cbook.cgi?ID=C30937383&Mask=20

[5] Irikura, Karl K. (1995). "Structure and thermochemistry of sulfur fluorides SFn (n=1–5) and their ions SF+n (n=1–5)". The Journal of Chemical Physics. 102 (13): 5357–5367. doi:10.1063/1.469263.

[6] Woon, David E.; Dunning, Thom H. (2009). "Theory of Hypervalency: Recoupled Pair Bonding in SFn(n= 1−6)". The Journal of Physical Chemistry A. 113 (27): 7915–26. doi:10.1021/jp901949b. PMID 19499905.

[7] Gao, Xiaozhen; Li, Nan; King, R. Bruce (December 2014). "Formation of Difluorosulfane Complexes of the Third Row Transition Metals by Sulfur-to-Metal Fluorine Migration in Trifluorosulfane Metal Complexes: The Anomaly of Trifluorosulfane Iridium Tricarbonyl". Inorganic Chemistry. 53 (23): 12635–12642. doi:10.1021/ic502375q. PMID 25397720.