8-Aminoquinoline as a new bidentate ligand for cis-MoO₂: synthesis and characterization of a dioxomolybdenum(VI) amide [MoO₂(NHC₉H₆N)₂]

Abstract

The reaction of (Bu₄N)₂[Mo₆O₁₉] with 8-aminoquinoline in the presence of DCC (N,N′-dicyclohexylcarbodiimide) afforded the cis-dioxo-Mo(VI) amide [MoO₂(NHC₉H₆N)₂], which was characterized by spectroscopy, mass spectrometry, ¹H NMR, and single-crystal X-ray analysis. X-ray crystallography shows that the complex exhibits a distorted octahedral geometry with each oxo ligand trans to the quinolyl nitrogen and the amido ligands are bound to the metal in an N,N-chelating fashion. The molecules form zigzag chains via C–H ··· O hydrogen bonds and the chains are connected into networks through interchain N–H ··· O hydrogen bonds.

Keywords:

• Dioxomolybdenum(VI)
• Aminoquinoline
• Amide
• Complex
• Crystal structure

Acknowledgments

This work was supported by the National Natural Science Foundation of China (No. 20676050).