Schiff-base complexes interactions

No information concerning the distribution of the unpaired electron on the chelate ligands of four-coordinated low-spin Co(II) Schiff base complexes is available from single crystal EPR spectra. In particular, no nitrogen hf interaction, which is sensitive to the ground state configurations, is observed. 

The Schiff base complex [SrL](BPh4)2 (L = (188)) was obtained by an in situ metal template procedure." This species undergoes a transmetallation reaction in dry ethanol to yield [Mn2NCS4] (L = (188)). No evidence for a magnetic exchange interaction was observed in this case. 

Spin cross-over behavior has been established for a number of Schiff base complexes of iron(III) complexes with N402-donor sets. A two-step spin cross-over in the warming direction for [Fe A-(8-quinolyl)salicylaldiminate 2](NCSe) has been ascribed to intermolecular TT-interactions between aromatic rings. Usually spin cross-over in these N402-complexes is... 

Although most oxovanadium(IV) complexes are blue, some Schiff base complexes may vary from yellow to maroon. Earlier suggestions that such colours, together with reductions in the V—O frequencies from 950-1000 to 800-850 cm-1, indicate polymerization or VO VO VO interaction are erroneous. Even for coordination environments which are very similar, the V=0 lengths may be very different, the vanadyl oxygens being exposed to the influence of the neighbouring molecules in the crystal.384... 

The Schiff base complex (123) forms a 1 1 complex with p-chloranil, which has been intensively investigated.851 There is evidence for both a n-n interaction of the aromatic rings with the complex, and a local donor-acceptor interaction of the metal with the chloro substituent. 

Catalytic oxidations using manganese complexes and dioxygen or peroxide oxidants are rather rare. Although reversible dioxygen adducts of the superoxo or peroxo type have been detected in the interaction of manganese(II)-pophyrin or -Schiff base complexes with O2 at low tem-... 

Magnetic exchange interactions in oxovanadium(iv)-Schiff base complexes have been studied in some detail this year. The temperature dependence of the magnetic susceptibility of NN -propylenebis(salicylaldiminato)oxovanadium-... 

USE OF ELECTRON PARAMAGNETIC RESONANCE SPECTROSCOPY TO STUDY THE INTERACTION BETWEEN COBALT SCHIFF BASE COMPLEXES AND PHOSPHINES OR PHOSPHITES IN SOLUTION+... 

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