Abstract
Five metal carbonyl complexes of N, N′-di(2-pyridyl)formamidine (HDpyF) and N, N′-di(6-methyl-2-pyridyl)formamidine (HDMepyF) are reported. Complexes of the type ReBr(CO) 3L (L=HDpyF, 1; L=HDMepyF, 2) were prepared by the reactions of ReBr(CO) 5 with HDpyF and HDMepyF in THF, respectively, while the complexes M(CO) 4(L) (M=Mo, L=HDpyF, 3; M=Mo, L=HDMepyF, 4; M=W, L=HDMepyF, 5) were prepared by the reactions of HDpyF or HDMepyF with corresponding Group 6 metal hexacarbonyls. The neutral dipyridylformamidine ligands in 1 and 2 adopt the s- cis- syn- s- cis and s- trans- anti- s- trans conformations, respectively, while those in complexes 3– 5 adopt the s- trans- anti- s- cis conformation.
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