in carbon disulfide on introduction of Cl2 into soln. of yellow As in CS2; first pptn. of brown As, on further introduction of Cl2 formation of AsCl3;;

oxygen in solid matrix arsenic sublimed at 300-375°C into an argon/O2 stream, passed through a low-power open microwave discharge for 4 h, codeposited at 15+/-2 K; detn. by IR-spectroscopy;

in solid matrix Irradiation (UV/VIS); arsenic sublimed at 300-375°C into an argon/ozone stream and codeposited at 15+/-2 K for 6-10 h, irrdn. at 290-1000 nm for 15 min; detn. by IR-spectroscopy;

in decalin byproducts: As (grey); (argon); reflux (1 h); filtration, evapn. (vac.), addn. of Et2O and Al2O3, drying to free-flowing, chromy. (Al2O3; Et2O/petroleum ether), recrystn. (Et2O/pentane); elem. anal.;