Tin(IV) fluoride

Tin(IV) fluoride
	; Unit cell of tin(IV) fluoride
Names
	IUPAC name tin(IV) fluoride
	Other names stannic fluoride, tin tetrafluoride
Identifiers
CAS Number	7783-62-2 ;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.029.105
EC Number	232-016-0;
PubChem CID	134654;
UNII	HNZ2XMR1ZF ;
	InChI InChI=1S/4FH.Sn/h4*1H;/q;;;;+4/p-4;
	SMILES [F-].[F-].[F-].[F-].[Sn+4];
Properties
Chemical formula	SnF4
Molar mass	194.704 g/mol
Appearance	white solid
Melting point	above 700 °C (sublimes)
Structure
Crystal structure	Tetragonal, tI10
Space group	I4/mmm, No. 139
Related compounds
Other anions	Tin(IV) chloride ; Tin(IV) bromide ; Tin(IV) iodide
Other cations	Carbon tetrafluoride ; Silicon tetrafluoride ; Germanium tetrafluoride ; Tin tetrafluoride ; Lead tetrafluoride
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Tin(IV) fluoride is a chemical compound of tin and fluorine with the chemical formula SnF₄ and is a white solid with a melting point above 700 °C.

SnF₄ can be prepared by the reaction of tin metal with fluorine gas:

Sn + 2F₂ → SnF₄

However, a passivating metal fluoride layer will be created and the surface will eventually become unreactive. An alternative synthesis is the reaction of SnCl₄ with anhydrous hydrogen fluoride:

SnCl₄ + 4HF → SnF₄ + 4HCl

With alkali metal fluorides (e.g. KF) hexafluorostannates are produced (e.g.K₂SnF₆), which contain the octahedral SnF₆²⁻ anion. SnF₄ behaves as a Lewis acid and adducts L₂·SnF₄ and L·SnF₄ have been produced.

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