Abstract

The synthesis and spectroscopy of the complexes [(CO) 5MnRu(Me)(CO) 2( α-diimine)] ( α-diimine = N, N′-diisopropyl-1,4-diaza-1,3-butadiene (iPr-DAB), pyridine-2-carbaldehyde- N-isopropylimine (iPr-PyCa) are reported. The metal fragments are bonded to each other by an uncommon manganese-ruthenium bond. The single crystal X-ray structure has been determined. The purple crystals of [(CO) 5MnRu(Me)(CO) 2(iPr-PyCa) are monoclinic, space group P2 1 n , Z=4 , with unit cell dimensions a=9.6297(7), b=20.923(1), c=10.166(1) A ̊ and β=92.190(8)° . The structure refinement converged to R=0.035 for 3277 observed reflections. Both complexes show a strong, solvatochronic absorption band in the visible region, which is assigned to Ru ( d π)→ α- diimine (π ∗) transitions. In aggreement with this assignment, the Raman spectra show resonance enhancement of Raman intensity for ν s(CO) and ν s(CN) of the Ru(Me)(CO) 2( α-diimine) fragment.

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