Tin(II) fluoride

• CAS: 7783-47-3
• Catalog Number: ACM7783473-1
• Category: Main Products
• Molecular Weight: 156.71 g/mol
• Molecular Formula: F2Sn
• Description: 99%
• Synonyms: Stannous fluoride, Tin difluoride, Tin bifluoride, Difluorostannylene
• Melting Point: 215°C
• Flash Point: Not applicable
• Density: 4.57
• Appearance: White crystals or powder
• Application: Tin(II) fluoride (SnF2) can be used:As an inhibitor of Sn4+ in fabrication of formamidinium tin Iodide (FASnI3) perovskite solar cells (PSCs) via SnF2-pyrazine complex formation.As a catalyst in glycerol ketalization, Knoevenagel condensation and aldol-type reactions.In the synthesis of α, β-epoxy ketone from α, α-dibromoacetophenone and aliphatic and aromatic aldehyde via oxidative addition of carbon-halogen bonds.In the stereocontrolled [3 + 3] , [3 + 4], [3 + 5] annulations reactions.
• Storage: -20°C
• Assay: 0.98
• EC Number: 231-999-3
• MDL Number: MFCD00042540
• Packaging: 100 g
• Quality Level: 200
• Stability: Stable. Non-flammable. Avoid contact with water or oxidizing agents. Moisture-sensitive.
• Storage Conditions: Keep refrigerated. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Do not expose to air. Store protected from moisture. Store under an inert atmosphere.

Case Study

Tin(II) Fluoride as a Lewis Acid for Neutral N/O-Donor Ligand Complexation

Gurnani, Chitra, et al. Dalton Transactions 42.23 (2013): 8364-8374.

Tin(II) fluoride (SnF2) acts as a moderately hard Lewis acid that forms stable complexes with neutral N- or O-donor ligands (diimines, dmso, Me3PO, pyNO) via fluoride-bridged dimeric or oligomeric structures, contrasting sharply with the softer SnCl2.
Experimental Protocol: SnF2 was suspended in MeOH and treated with 2,2'-bipyridyl or 1,10-phenanthroline at room temperature. Alternatively, SnF2 was dissolved in hot dmso and crystallized upon cooling. Me3PO or pyNO in MeOH yielded [SnF2(Me3PO)] or [SnF2(pyNO)].
Performance Evaluation: X-ray structures revealed trigonal pyramidal Sn(II) cores with terminal Sn-F (~2.03 Å) and asymmetric bridging Sn-F (2.11-2.28 Å). [SnF(bipy)]2[SnF6] contained an unexpected [Sn^ⅣF6]^2- unit from air oxidation. [SnF(phen)]2[SnF4]·2MeOH showed a similar motif. [SnF2(dmso)] assembled into 1-D chains via long Sn···F contacts. 19F NMR displayed broad singlets (δ -80 to -110), indicating lability. Unlike SnCl2, SnF2 did not form phosphine complexes; with N-heterocyclic carbene IDiPP it produced the first discrete [SnF3]- anion as [IDiPPH][SnF3].
Conclusion: SnF2 coordinates hard donors through fluoride bridges, but its poor solubility and lack of a labile synthon limit phosphine coordination chemistry.

Tin(II) Fluoride as Cathode Material in Fluoride-Ion Batteries with Carbon Additives

Zakalyukin, Ruslan M., et al. Synthetic Metals 298 (2023): 117446.

Tin(II) fluoride (SnF2) serves as a high-capacity cathode material in solid-state fluoride-ion galvanic cells, where the addition of single-walled carbon nanotubes (SWCNT) substantially improves current density by enhancing electronic conductivity.
Experimental Protocol: Multilayer pellets were fabricated with a cerium anode, a La_1-xBa_xF_3-x (x≈0.05) tysonite electrolyte, and a SnF2 cathode containing various carbon additives (graphite, TEG, EG, graphene, SWCNT, or SnF2@SWCNT nanocomposite). Cells were characterized by SEM, cyclic voltammetry, impedance spectroscopy, and Raman spectroscopy.
Performance Evaluation: The pristine SnF2 cell exhibited open-circuit voltages (OCV) of 1.69 V at room temperature and ~1.46 V at 180 °C. The EG-added cell gave an OCV of 2.45 V at room temperature. Among all additives, SnF2@SWCNT nanocomposite achieved the highest current density (1.295 A/m² at 180 °C), more than 2.5 times higher than pure nanotubes. Mechanical mixing of carbon additives followed by grinding reduced current density, whereas the nanocomposite approach preserved performance.
Conclusion: SnF2 is a viable cathode material for fluoride-ion batteries, and SnF2@SWCNT nanocomposite significantly boosts current density, making it promising for high-performance solid-state electrochemical cells.

Tin(II) Fluoride as a Precursor for High-Conductivity Solid Electrolytes in Room-Temperature Fluoride-Ion Batteries

Liu, Lei, et al. Journal of Alloys and Compounds 819 (2020): 152983.

Tin(II) fluoride (SnF2) serves as a key starting material for synthesizing MSnF4 (M = Ba, Pb) solid electrolytes via high-energy ball milling and annealing, enabling room-temperature operation of solid-state fluoride-ion batteries (FIBs).
Fabrication Process: BaF2 or PbF2 was milled with SnF2 (500 rpm, 18 h) and annealed at 300 °C under Ar. The resulting BaSnF4 or PbSnF4 was mixed with BiF3, Sn, and CNTs to form composite electrodes. Full cells were assembled as Sn|MSnF4|BiF3.
Performance Evaluation: PbSnF4 achieved an ionic conductivity of 5.44×10^-4 S/cm at room temperature, higher than BaSnF4 (2.02×10^-4 S/cm). Activation energies were 0.26 eV (PbSnF4) and 0.23 eV (BaSnF4). The Sn/PbSnF4/BiF3 cell delivered an initial discharge capacity of 175 mAh/g (58% of theoretical) at 12.7 μA/cm², compared to 125 mAh/g for the BaSnF4-based cell. Capacity faded over 10 cycles due to volume changes, but coulombic efficiency remained >90%.
Conclusion: SnF2-derived BaSnF4 and PbSnF4 are promising room-temperature fluoride-ion conductors, with PbSnF4 offering superior initial capacity.

Custom Reviews

February 6, 2023

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High efficiency inhibitor
The complex of tin(II) fluoride and pyrazine is used as an inhibitor of Sn4+ in the preparation of perovskite solar cells (PSC).

Custom Q&A

What is the molecular formula of Tin(II) fluoride?

The molecular formula of Tin(II) fluoride is F2Sn.

What is the molecular weight of Tin(II) fluoride?

The molecular weight of Tin(II) fluoride is 156.71 g/mol.

What is the IUPAC name of Tin(II) fluoride?

The IUPAC name of Tin(II) fluoride is difluorotin.

What is the InChI of Tin(II) fluoride?

The InChI of Tin(II) fluoride is 1S/2FH.Sn/h2*1H;/q;;+2/p-2.

What is the InChIKey of Tin(II) fluoride?

The InChIKey of Tin(II) fluoride is ANOBYBYXJXCGBS-UHFFFAOYSA-L.

What is the canonical SMILES of Tin(II) fluoride?

The canonical SMILES of Tin(II) fluoride is F[Sn]F.

What are some synonyms of Tin(II) fluoride?

Some synonyms of Tin(II) fluoride are Stannous fluoride, STANNOUS FLUORIDE, Tin difluoride, and Fluoristan.

What is the CAS number of Tin(II) fluoride?

The CAS number of Tin(II) fluoride is 7783-47-3.

What is the UN number of Tin(II) fluoride?

The UN number of Tin(II) fluoride is 2811.

What is the purpose of Tin(II) fluoride in toothpastes?

Tin(II) fluoride is commonly used in toothpastes for the prevention of gingivitis, dental infections, cavities, and to relieve dental hypersensitivity. It has been shown to be more effective at stopping and reversing dental lesions compared to Sodium Fluoride.