The extremely rapid acid-catalysed additions of acetylenes to [Pd2Cl2(µ-Ph2PCH2PPh2)2] and the synthesis of [Pd2Cl2(µ-Ph2PCH2PPh2)2(µ-CCH2)]
Abstract
The addition of acetylenes such as HCCH, HCCPh, or MeOOCCCCOOMe to [Pd2Cl2(µ-Ph2PCH2PPh2)2] to give ‘dimetallated olefins’ is catalysed by traces of acid or methanol but inhibited by a base: the ‘dimetallated olefin’ complex [Pd2Cl2(µ-Ph2PCH2PPh2)(µ-HCCH)] makes an interesting comparison with the vinylidene complex [Pd2Cl2(µ-Ph2PCH2PPh2)2(µ-CCH2)].