For these reactions I need mechanisms like "with curly arrows" like I-I bonds breaking and what happens next:
1. Sn + 2I2 -> SnI4 (Ac2O,AcOH, reflux)
2. SnI4 + 2PPh3 -> (PPh3)2SnI4 (CHCl3)
3. SnI4 + (Me2SO)2 -> SnI4(Me2SO)2 (CH2Cl2)
This handwritten solution contains step-by-step reaction mechanisms with 'curly arrows'. Explanations on oxidation states and mechanisms types are provided for further understanding.