Physico-chemical study of first row transition metal ions coordination compounds with N,N′-bis(2-tosylaminobenzylidene)-1,3-diaminopropanol. The crystal structure of bis-azomethine and its cobalt(II) complex

Physico-chemical study of the complex formation between 2-(tosylamino)benzaldehyde bishydrazones and transition metal ions

“…The strength of antiferromagnetic exchange interaction between copper ions was lower in the case of the complex with pyrazole fragment that that in the case of the complex with acetate group, contrary to the earlier studied case of the complexes with bisazomethine derivatives of salicylic aldehyde and 2-tosylaminobenzaldehyde [23]. Therefore, the binuclear complexes of copper(II) and zinc(II) based on bishydrazones of 2-tosylaminobenzaldehyde 2 existed most likely in the form of structure Vb, the exchange binding between the metal ions being absent.…”

“…Addition of D 2 O led to the complete suppression of the signals of protons of NH groups. Owing to the presence of additional donating nitrogen atoms in the structure, bishydrazones of salicylic aldehyde derivatives can form both binuclear coordination compounds IVa (structurally similar to the complexes with the ligands based on 1,3diaminopropan-2-ol [9,23,[30][31][32][33][34][35][36][37][38][39][40][41][42]), and metal chelates IVb with two metal ions having nonequivalent coordination surroundings [4,9,[43][44][45].…”

“…Analysis of the data available on magnetic properties of the complexes IVa [9,23,[30][31][32][33][34][35][36][37][38][39][40][41][42] and quantum-chemical simulation of the exchange parameters [38][39][40][41][42] demonstrated that realization of the symmetric structure assumed strong antiferromagnetic exchange interaction between ions of the metal, significantly affected by the electronic properties of the substituents both in the chelate fragment and in the salicylic aldehyde part of the molecule. In the case of complexes IVb, antiferromagnetic exchange of intermediate strength (2J = -160 to -290 cm -1 ) was observed; the value was not much affected by the substituents nature [43][44][45].…”

“…The most probable structures of tautomers and geometry isomers of compounds II and III are presented in Scheme 1. We have earlier prepared and comprehensively studied a series of transition metal chelates based on 2-(tosylamino)benzaldehyde and 1,3-diaminopropan-2-ol [23]. Magnetic properties of binuclear copper(II) complexes have been investigated in detail, and the correlations between the nature of the bridging group of the exchange fragment and the value of the exchange interaction parameter 2J have been revealed.…”

High-Throughput Small-Molecule Crystallography at the ‘Belok’ Beamline of the Kurchatov Synchrotron Radiation Source: Transition Metal Complexes with Azomethine Ligands as a Case Study

“…For a series of iron-based complexes, the spin crossover effect was reported [24,25]. Polynuclear transition metal complexes with azomethines are also promising as single-molecule magnets or at least as synthetically affordable models to study exchange interactions between paramagnetic sites and to verify modern theoretical approaches to the prediction of magnetic properties [26][27][28][29][30][31][32].…”