Kinetic and Mechanistic Studies of Substitution Reactions of Solvated Cobalt(II), Nickel(II), Copper(II) and Zinc(II) Ions with 2,2′:6′,2″-Terpyridine and Several 2,2′:6′,2″-Terpyridine Derivatives. Evidence for the Formation of Intermediates

Mechanism of water exchange on five-coordinate copper(ii) complexes

“…16,18-20 Due to the steric hindrance afforded by three of the donor groups of the tetradentate ligand, an associative substitution process is no longer possible. Interestingly, very recently, it has been reported 21 2Ϫ (fz = ferrozine = 5,6-bis(4-sulfonatophenyl)-3-(2pyridyl)-1,2,4-triazine) and our observations on related systems are reported herein. The coordination geometry of the former complex species has been firmly established in aqueous solution as trigonal bipyramidal.…”

A 31P NMR Investigation of the CoPi Water‐Oxidation Catalyst

“…The correlation time of this interaction is too fast for even 60 kHz magic‐angle‐spinning to have any effect 8. The contribution of paramagnetic relaxation will drastically decrease T 1 9 and be independent of spinning speeds. Correspondingly, an inversion‐recovery experiment indicates that CoPi phosphates have a constant T 1 of 18.7 ms. For comparison, the diamagnetic mineral apatite, having a similar local 31 P environment but calcium instead of cobalt, can have a T 1 of between 1000 to 120 000 ms, depending on the specific chemical conditions 10.…”

New Insights into Nickel(II), Iron(II), and Cobalt(II) Bis‐Complex‐Based Metallo‐Supramolecular Polymers

“…[16][17][18][19] The equilibrium constants and the mass balances are strongly New Insights into Nickel(II), Iron(II), and Cobalt(II) Bis-Complex-Based Metallo-Supramolecular Polymers influenced by the binding strength of the metal ion and also by the stability of the mono and bis complexes, as it is described in the following scheme:…”