mercury dibromide in carbon disulfide under N2, reaction of P4 with I2, followed by treatment of the soln. with HgBr2, further products Br2P2I2, BrIP2BrI, BrIP2I2 and P2I4; not isolated, identified by 31P-NMR spectroscopy;

mercury dibromide in carbon disulfide under N2, reaction of P4 with I2, followed by treatment of the soln. with HgBr2, further products PI3 and P7I3; not isolated, identified by 31P-NMR spectroscopy;