Abstract The reaction of H 2 C (PCl 2) 2 with four equivalents of iPrMgCl produces H 2 C (PiPr 2) 2, which was treated with tellurium in boiling toluene, or selenium in toluene at room temperature, to give the monochalcogenides EPiPr 2 CH 2 PiPr 2 (E= Te, 4a; E= Se, 4b) in high yields. X-ray structural determinations show that 4a and 4b exist as the CH 2 tautomers in the solid state with E–P–C–P dihedral angles of 56.1 (2) and 56.7 (1), respectively. DFT ...
