Compound Substances

Oxidation State Substances
W-IV [W (CO)4 ]4-
W-II [W (CO)5 ]2-
W-I [W2 (CO)10 ]2-
W0 W (CO)6
WII WCl2 , WBr2 , WI2 , complexes
WIII WCl3 , WBr3 , WI3 , complexes
WIV WO2 , WF4 , WCl4 , etc., WS2 , complexes
WV W2O5 , WF5 , WCl5 , WF6-, complexes
WVI WO3 , WO42-, WF6 , WCl6 , WOCl4 ,
  politungstates, complexes