Turned in this report and my professor commented with his thoughts $$\ce{Sn + 2Rcl \rightarrow R2SnCl2 \rightarrow R2Sn }\text{ (white solid)} \ce{+ SnCl2 \rightarrow R3SnCl}$$$$\ce{Sn + 2RCl \rightarrow R2SnCl2 \rightarrow R2Sn }\text{ (white solid)} \ce{+ SnCl2 \rightarrow R3SnCl}$$ but I didn't get the question wrong. So unless if someone contributes another answer, I'll accept this as the answer.