# Species Formula 1928 SiF6(2-) (JIJKOC) (Geo)F6Si 1929 SiF6(2-) (JIJKOC)F6Si 1930 DisilaneH6Si2 1931 Disilane (Geo)H6Si2 1932 HexamethyldisilaneC6H18Si2 1933 HexamethyldisilazaneC6H19NSi2 1934 HexamethyldisiloxaneC6H18OSi2 1935 H6Si2O7H6O7Si2 1936 TrisilaneH8Si3 1937 Cyclopentasilane (Geo)H10Si5 1938 Si(SiMe3)4 (GUFMOJ) (Geo) C12H36Si5 1939 Si(SiMe3)4 (GUFMOJ)C12H36Si5 1940 Phosphorus, cationP 1941 Phosphorus, atomP 1942 PhosphinideneHP 1943 PhosphinoH2P 1944 Phosphine cationH3P 1945 Phosphine (Geo)H3P 1946 PhosphineH3P 1947 PH4(+)H4P 1948 Carbon monophosphideCP