Abstract: NMR, IR and Raman spectroscopic studies were used to probe the presence of MLCT phenomenon for four macrocyclic diamagnetic hexa-coordinate complexes: [L3Fe]2+ and [L3Co]3+, where (L= 2,2-bipyridine and 1,10-phenanthroline) for each complex by DFT implemented in ADF.2012.01 After pre-optimization of complexes, the NMR parameters: Chemical Shifts of constituents (δ Mn+, δ14N, δ13C, and δ1H), their total NMR shielding tensors (σMn+, σ14N, σ13C, and σ1H) containing 2 diamagnetic and 4 paramagnetic contributions, k and j were obtained by using the "NMR Program...........
Key words: Chemical Shift, Total NMR Shielding Tensor, Spin-Spin Coupling Constant, Fermi-contact, Effective Spin Hamiltonian
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