Komplexchemie polyfunktioneller Liganden, XXXIV. : Direkte Synthese und Derivate von Co2(CO)6(R2ECH2CH2ER2) (E=P, As; R=C6H5) / Complex Chemistry of Polyfunctional Ligands, XXXIV Direct Synthesis and Derivatives of Co2(CO)6(R2ECH2CH2ER2) (E = P, As; R = C6H5)

Octacarbonyldicobalt reacts with the ditertiary phosphine and arsine (C₆H₅)₂-ECH₂CH₂E(C₆H₅)₂ (E = P, As) in a direct route to give primarily the non CO-bridged, but ligand-bridged complexes Co₂(CO)₆(C₆H₅)₂ECH₂CH₂E(C₆H₅)₂. From Co₂(CO)₆-(C₆H₅)₂PCH₂CH₂P(C₆H₅)₂ secondarily a CO-bridged isomer has been also isolated. The non-CO-bridged form of Co₂(CO)₆(C₆H₅)₂PCH₂CH₂P(C₆H₅)₂ gives insertion reactions with Hg, SnCl₂ and CsGeCl₃ yielding the probably oligo- or polymeric compounds Hg[Co(CO)₃]₂(C₆H₅)₂PCH₂CH₂P(C₆H₅)₂ and Cl₂M[Co(CO)₃]₂(C₆H₅)₂PCH₂CH₂P(C₆H₅)₂ (M = Sn, Ge). The characteristic IR absorptions of all compounds and some Raman spectra are reported.