Before revision: Synthesis The reaction of sodium phosphide and bismuth trichloride in toluene (0 °C): Na3P + BiCl3 -> BiP + 3NaCl
After revision: Synthesis One route entails the reaction of sodium phosphide and bismuth trichloride in toluene (0 °C): Another method uses tris(trimethylsilyl)phosphine in place of the sodium phosphide.