Chemical Bonding

maybe my chemical knowledge is poor, so I don't know the existence of such SeOS2 . What i know is (SeOs)2- selenium osmium ion, which is a type of inorganic selenide , e.g. Na(SeOs), in soil...

but, if SeOS2 really exist, I think the sulphur gain double bond with Se due to more effective d pi - d pi bond overlapping in between Se and S, rather than the p pi - d pi bond overlapping. Thus, Se form preferentially double bond with S, and dative bond to O atom...

however, this will make the molecule to be T shape..... which I think is not exist in selenium atom!