Acenaphtho[5,6-cd]-1,2-dichalcogenoles and their platinum complexes

Seven platinum bisphosphine complexes have been prepared from acenaphtho[5,6-cd]-1,2-dichalcogenoles AcenapylE2 E = S, Se, following metathetical addition of the dilithium precursors to cis-[PtCl2(PR3)2] (R3 = Ph3, Ph2Me, PhMe2, Me3). [Pt(5,6-AcenapylS2)(COD)] was also prepared in a similar manner from (1,5-cyclooctadiene)platinum(II) dichloride.