Synthesis of thio and mixed donor atom macrocycles containing coordinated diyne units

摘要

The acid-catalysed reaction of the diyne complex [{Co-2 (CO)(6)}(2) (mu-eta(2):mu-eta(2)-HOCH2C2C2CH2OH)] with a range of dithiols leads in each case to the formation of at least two cyclic products, a monomeric product [{Co-2 (CO)(6)}(2) ( (mu-eta(2):mu-eta(2)-SCH2C2C=CCH2SR)] and a dimeric product [{Co-2 (CO)(6)}(2) (mu:eta(2):mu:eta(2) -SCH2C2C2CH2SR)](2), [R = (CH2)(n) (n = 3-6)]. This method may also be applied to dithiols that contain additional donor atoms such as S or O to give crown type macrocycles. The crystal structures of several of the above new complexes are reported. [References: 32]