Neutral fac-[Re(NNN)(CO)3] complexes with NNN tridentate ligands containing pyrrole or indole

• Tridentate NNN ligands containing pyrrole or the important indole were synthesized.
• Complexation with the [Re(CO)3]+ core generated new stable [Re(NNN)(CO)3] complexes.
• Deprotonation of pyrrole and indole during complexation leads to neutral complexes.

New neutral fac-ReNNN(CO)3 complexes where NNN are the Schiff base tridentate ligands N-(1H-pyrrol-2-ylmethylene)-2-(pyridin-2-yl)ethanamine (complex 1) and N-(1H-indol-2-ylmethylene)-2-(pyridin-2-yl)ethanamine (complex 2) were synthesized and characterized by elemental analyses, infrared and 1H and 13C NMR spectroscopies. The molecular structure of complex 1 was confirmed by X-ray crystallographic analysis that revealed a distorted octahedral geometry around Re.

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