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Seven compounds containing tin-copper bonds, namely [Ph 2P(CH2)n .PPh2] (CuSnPh3 ) 2(n=1-4) and (Ph2PR)CuSnPh3 (R=Ph, Bu, Am), have been synthesized. Tin-119 Moessbauer spectrafor these compounds were detethened. The results have shown that the QS values for thesecompounds are all zero, the IS values are between 1.32 and 1 .38 mm/s, and the oxidation state of tinis +4.