Reaction of phosgene with tin halides

The reaction between tin(II) chloride and phosgene has been investigated tensimetrically between 27 and 377 C the reaction starts at 262 C and has an activation energy of 86 U mor [1187]  

Phosgene is a common impurity found in commercial tin(IV) chloride, and impurity levels have been determined by gas chromatography - mass spectrometry [1515,2257]. Tin(IV) chloride dissolves in phosgene at -78 C removal of the excess of COClj at -45 C led to the isolation of a pale yellow liquid, [SnCl COCClj) ], which decomposes slowly at room temperature back to SnCl., and COCIj [1012]. No evidence for a 1 1 complex was found. The 2 1 complex exhibits i.r. bands (Nujol) corresponding to r(C=0) at 1805 cm , eg CCl ) at 835 cm , irfCOClj) at 580 cm , i s(CClj) at 570 cm , j(OCCl) at 300 cm , and r(SnCl ) at 359 cm , and these bands are only slightly shifted from those of free COClj (cf. Table 9.1) [1012]. 

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