摘要:
AbstractReactions of the tetrahedral C2Co2 cluster‐bridged bipyridine ligand [(4‐C5H4NCO2CH2)2C2Co2(CO)6] (La) with [{M(dppb)(H2O)2}(OTf)2] (M = Pd, Pt; dppb = 1,4‐bis(diphenylphosphanyl)butane; OTf = SO3CF3) and AgX (X = NO3, SbF6) gave cationic metallamacrocycles [{M(dppb)La}2(OTf)4] (1, M = Pd; 2, M = Pt) and [(AgLa)2X2] (3, X = NO3; 4, X = SbF6). Furthermore, the isomeric C2Co2 cluster‐bridged bipyridine ligand [(3‐C5H4NCO2CH2)2C2Co2(CO)6] (Lb) reacted with ZnCl2 and AgX (X = PF6, ClO4) to afford cationic macrocycle [(ZnLbCl2)2] (5) and coordination polymers [(AgLbX)n] (6, X = PF6; 7, X = ClO4), respectively. Whereas flexible ligand La is known, Lb is new and could be prepared by reaction of but‐2‐yne‐1,4‐diyl dipyridine‐3‐carboxylate with [Co2(CO)8]. New self‐assembled products 1–7 and ligand Lb were characterized by elemental analysis and spectroscopy, and 1, 3–7, and Lb were additionally characterized by X‐ray crystallography. In addition, the electrochemistry of Lb and 5 were studied by cyclic voltammetry. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)