Mesoionic Imines (MIIs): Strong Donors and Versatile Ligands for Transition Metals and Main Group Substrates.
Richard RudolfNicolas I NeumanRobert R M WalterMark R RingenbergBiprajit SarkarPublished in: Angewandte Chemie (International ed. in English) (2022)
We report the synthesis and the reactivity of 1,2,3-triazolin-5-imine type mesoionic imines (MIIs). The MIIs are accessible by a base-mediated cycloaddition between a substituted acetonitrile and an aromatic azide, methylation by established routes and subsequent deprotonation. C=O-stretching frequencies in MII-CO 2 and -Rh(CO) 2 Cl complexes were used to determine the overall donor strength. The MIIs are stronger donors than the N-heterocyclic imines (NHIs). MIIs are excellent ligands for main group elements and transition metals in which they display substituent-induced fluorine-specific interactions and undergo C-H activation. DFT calculations gave insights into the frontier orbitals of the MIIs. The calculations predict a relatively small HOMO-LUMO gap compared to other related ligands. MIIs are potentially able to act as both π-donor and π-acceptor ligands. This report highlights the potential of MIIs to display exciting properties with a huge potential for future development.
Keyphrases
- density functional theory
- human health
- molecular dynamics
- molecular dynamics simulations
- molecular docking
- risk assessment
- health risk
- computed tomography
- current status
- health risk assessment
- positron emission tomography
- gene expression
- heavy metals
- diabetic rats
- climate change
- amino acid
- drinking water
- crystal structure