Syntheses, Characterization and Crystal Structure of Two Manganese(Ⅲ) Complexes with Ligand N,N'-Ethylenebis(1-phenyl-3-imino-1-butanone)

Abstract

Abstract: Two manganese(Ⅲ) complexes with the ligand bzacen^2- [bzacen^2-=N, N' ethylenebis(1-phenyl-3-imino-1-butanone)], Mn(bzacen)(NO₂)(EtOH) (1) and Mn(bzacen)(NO₂)(MeOH) (2), have been synthesized and characterized by IR, electronic spectra and cyclic voltammetry. Both complexes crystallize in the orthorhombic system, space group Pbca, with parameters for complex 1: a=2.8173(6)nm, b=2.1946(4)nm, c=0.7683(6)nm, V=4.750(5)nm³, Z=8, μ=5.71 cm^-1, and with parameters for complex 2: a=2.7641(6)nm, b=2.1832(4)nm, c=0.7705(2)nm, V=4.650(3)nm³, Z=8, μ=5.81 cm^-1. The final Rvalues are 0.0540 for complex 1 and 0.0564 for complex 2, respectively. The structure determination of the title complexes reveals an octahedral coordination with an N₂O₂ equatorial plane composed of the donor atoms from the Schiff base ligand bzacen^2-. In these complexes, ν_C=N, ν_C=O and ν_C=C are shifted to lower frequencies in IRspectra; π-π^* transitions, d-π^* charge transitions and d-d^* ligand field transitions are observed in their electronic spectra.

Key words: Schiff base, Manganses(Ⅲ) complex, Crystal structure, IR spectroscopy, Electronic absorption spectroscopy

CLC Number:

O614.2

TrendMD:

FENG Yun-Long, LIU Shi-Xiong . Syntheses, Characterization and Crystal Structure of Two Manganese(Ⅲ) Complexes with Ligand N,N'-Ethylenebis(1-phenyl-3-imino-1-butanone)[J]. Chem. J. Chinese Universities, 2001, 22(6): 887.

References

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