From phosphanylphosphaalkenes to coordination copper and silver polymers containing P–P bonds

Abstract

This study was focused on the activation of the CP bond via reactions of Ph₂CP-PtBu₂ (1) with 1,6-hexanediol and selected dithiols (1,4-butanedithiol, 1,4-benzenedithiol and 1,4-benzenedimethanethiol). These reactions proceed according to a 1,2-addition mechanism, providing new compounds with formulas {(Ph)₂(H)C-P-PtBu₂}{μ²-(O-(CH₂)₆-O)}{tBu₂P-P-C(H)(Ph)₂} (2), {(Ph)₂(H)C-P-PtBu₂}{μ²-(S-(CH₂)₄-S)}{tBu₂P-P-C(H)(Ph)₂} (3a), {(Ph)₂(H)C-P-PtBu₂}{μ²-(S-C₆H₄-S)}{tBu₂P-P-C(H)(Ph)₂} (3b), and {(Ph)₂(H)C-P-PtBu₂}{μ²-(S-CH₂-C₆H₄-CH₂-S)}{tBu₂P-P-C(H)(Ph)₂} (3c). Next, the reactions of 3a and 3c with metal chlorides led to the growth of desired coordination polymers of copper(I) and silver(I). All the obtained compounds remained stable under atmospheric conditions.