| Abstract
| - The halogenation reactions of tin(II) alkyl SnR12 (1) [R1 = CH(SiMe3)C9H6N-8] with SnX2 to give R12SnX2 [X = F (2), Cl (3), Br (4), I (5)] have been studied by 1H, 119Sn NMR and X-ray structure analysis. Intermediate compounds R12Sn→SnX2 [X = Cl (6), Br (7)] and R1SnX [X = Cl (8), Br (9)] isolated from the reaction suggested that the redistribution reaction proceeded via the “head-to-head” approach of SnR12 and SnX2.
- The halogenation of the tin(II) alkyl SnR12 (1) [R1 = CH(SiMe3)C9H6N-8] to give R12SnX2[X = F (2), Cl (3), Br (4), I (5)] was investigated by reacting 1 with SnX2 (X = F, Cl, Br, andI), PbCl2, BCl3, and X2 (X = Br, I), respectively. 1H, 119Sn NMR and X-ray analysis showedthat the reactions with SnX2 under a milder experimental condition afforded intermediatecompounds, R12Sn→SnX2 [X = Cl (6), Br (7)] and R1SnX [X = Cl (8), Br (9)]. Further heatinggave the final products R2SnX2. The X-ray structures of 2−6 and 9 have been determined.The dynamic exchange process between diastereoisomers of R1SnX (X = Cl, Br) has beenstudied by variable-temperature 1H and 119Sn NMR spectroscopy.
|
