Trimethyltin chloride

Trimethyltin chloride
Names
	Other names chlorotrimethylstannane; chlorotrimethyltin; trimethyl chlorostannane; trimethylchlorotin; trimethylstannyl chloride; trimethyltin monochloride
Identifiers
CAS Number	1066-45-1 ;
ECHA InfoCard	100.012.653
UNII	9E3BCA3684 ;
CompTox Dashboard (EPA)	DTXSID6042496 ;
Properties
Chemical formula	C3H9SnCl
Molar mass	199.27 g/mol
Melting point	38.5 °C (101.3 °F; 311.6 K)
Boiling point	148 °C (298 °F; 421 K)
Hazards
Safety data sheet (SDS)	External MSDS
	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

Trimethyltin chloride is an organotin compound with the formula (CH₃)₃SnCl. It is a white solid that is highly toxic and has a stench. It is susceptible to hydrolysis.

Synthesis

Trimethyltin chloride can be prepared by the redistribution reaction of tetramethyltin with tin tetrachloride.^[2]

SnCl₄ + 3 SnMe₄ → 4 Me₃SnCl

This is the Kocheshkov redistribution reaction. It is performed under an inert atmosphere, such as argon, typically with no solvent.

A second route to Me₃SnCl involves treating the corresponding hydroxide or oxide with a halogenating agent such as hydrogen chloride or thionyl chloride (SOCl₂):

Me₃SnOH + HCl → Me₃SnCl + H₂O

Uses

Trimethyltin chloride is used as a source of the trimethylstannyl group.^[3] For example, it is a precursor to vinyltrimethylstannane:

CH₂=CHMgBr + Me₃SnCl → Me₃SnCH=CH₂ + MgBrCl

An example of an organolithium reagent reacting with Me₃SnCl to form a tin-carbon bond is:

LiCH(SiMe₃)(GeMe₃) + Me₃SnCl → Me₃SnCH(SiMe₃)(GeMe₃) + LiCl

Organotin compounds derived from Me₃SnCl are useful in organic synthesis, especially in radical chain reactions. Me₃SnCl is a precursor to compounds used in PVC stabilization. Reduction of trimethyltin chloride gives tin-tin bonds.

Me₃SnM + Me₃SnCl → Sn₂Me₆ + MCl (M = metal)

References

^ Lide, D. R.; Milne, G. W. (1994). Handbook of Data on Organic Compounds. Vol. 4 (3rd ed.). CRC Press. p. 4973.
^ Scott, W. J.; Crisp, G. T.; Stille, J. K. (1990). "Palladium-catalyzed Coupling of Vinyl Triflates with Organostannanes: 4-tert-Butylcyclohexen-1-yl)-2-propen-1-one". Organic Syntheses. 68: 116{{cite journal}}: CS1 maint: multiple names: authors list (link); Collected Volumes, vol. 8, p. 97.
^ Davies, A. G. (2008). "Tin Organometallics". Comprehensive Organometallic Chemistry. Vol. 3. Elsevier. pp. 809–883. doi:10.1016/B0-08-045047-4/00054-6.

[1] Lide, D. R.; Milne, G. W. (1994). Handbook of Data on Organic Compounds. Vol. 4 (3rd ed.). CRC Press. p. 4973.

[2] Scott, W. J.; Crisp, G. T.; Stille, J. K. (1990). "Palladium-catalyzed Coupling of Vinyl Triflates with Organostannanes: 4-tert-Butylcyclohexen-1-yl)-2-propen-1-one". Organic Syntheses. 68: 116{{cite journal}}: CS1 maint: multiple names: authors list (link); Collected Volumes, vol. 8, p. 97.

[3] Davies, A. G. (2008). "Tin Organometallics". Comprehensive Organometallic Chemistry. Vol. 3. Elsevier. pp. 809–883. doi:10.1016/B0-08-045047-4/00054-6.

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