Pyrazolylborates ligand, nature

Photophysical studies revealed that the nature of the pyrazolylborate ligand has significant influence in complexes 530-535, by virtue of it tuning the metal HOMO energies, making these materials highly emissive at room temperature. For... 

Pyrazolylborates have now been also used to extract Mg, Ca, Sr, and Be from aqueous solutions into CH2C12 selectivity depends on the nature of the ligand. The structures of [HBpz3]2M, M = Mg, Ca have distorted octahedral coordination with tridentate N bonding the beryllium compounds discussed earlier were tetrahedral. 

The measurement of the electronic nature of Tp ligands can be readily performed using the well-known probe of metal carbonyls and infrared spectroscopy. Series of TpfM(CO) (M=Cu, Ag) complexes have been prepared providing a collection of v(CO) values from which the relative electron-donating capabilities of the pyrazolylborate... 

---