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New pre-ligands of 1-aryl-1H-imidazol-2-yl substituted secondary phosphine oxides (HRP(O)-Im:SPO-Im) were prepared and characterized by spectroscopic means. The SPO-Im pre-ligands are able to tautomerize to their corresponding genuine ligands, the 1-aryl-1H-imidazol-2-yl substituted phosphinous acids ((HO)RP-Im:PA–Im) while the condition permitted. Further reactions of selected SPO-Im pre-ligands...
An unexpected cobalt‐containing zwitterionic complex, [{(μ‐PPh2CH2PPh2)Co2(CO)4}{μ,η‐(R1)PC≡CCH2(R2)}] (8; R1 = Ph2Bz; R2 = 3‐CoBr3‐1‐benzimidazole), has been obtained during an attempt to modify the imidazole moiety in the alkyne‐bridging dicobalt complex [{(μ‐PPh2CH2PPh2)Co2(CO)4}{μ,η‐Ph2PC≡CCH2(IM)}] (5; IM = benzimidazole) to a carbene‐type substituent by reaction with benzyl bromide. As revealed...
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