Communication

Chem. Commun., 2005, 4976 - 4978, DOI: 10.1039/b509810f

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A Cu–Zn–Cu–Zn heterometallomacrocycle shows significant antiferromagnetic coupling between paramagnetic centres mediated by diamagnetic metal

Elena A. Buvaylo, Vladimir N. Kokozay, Olga Yu. Vassilyeva, Brian W. Skelton, Julia Jezierska, Louis C. Brunel and Andrew Ozarowski

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An unprecedented antiferromagnetic exchange mediated by two –O–Zn–O– bridges, with singlet–triplet splitting J= 35.0 cm^–1, was observed between two copper centers separated by 5.7062(9)Å in the heterometallomacrocyclic diethanolamine (H₂L) complex [Cu₂Zn₂(NH₃)₂Br₂(HL)₄]Br₂·CH₃OH.

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