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1127densation reactions to yield higher nuclearity cluster^.^.^^ This apparently occurred in these solutions also, and 1 mol of 1 combined with 1 mol of 0s3(CO),,(p3-S) t o yield 2. This was supported by t h e results of an independent reaction of 1 with Os3- (CO),o(p3-S), which gave 2 in 43% yield.Acknowledgment.

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The Schiff base condensation of 1,2‐diaminoethane and 2,6‐diacetylpyridine in the presence of a lanthanide acetate produces the complexes (I) with excellent yields, where L is the macrocycle and n varies between 3 and 6 depending on the metal and the ambient conditions.