[CH2:1]([Sn](Cl)(Cl)Cl)[CH2:2][CH2:3][CH3:4].[CH2:9]([Sn:13]([Br:16])(Br)Br)[CH2:10][CH2:11][CH3:12]>>[Sn:13]([Br:16])([CH2:9][CH2:10][CH2:11][CH3:12])([CH2:1][CH2:2][CH2:3][CH3:4])[CH2:1][CH2:2][CH2:3][CH3:4]In place of the BuSnCl3 mentioned initially an equimolar amount of BuSnBr3 may be used to give Bu3SnBr in the same manner, but after 2.5 hours.
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