Structural characterisation of metal complexes containing 1-[(4-methylphenyl)sulfonamido]-2-[(2-pyridylmethylene) amino]benzene
作者:Antonio Sousa、Manuel R. Bermejo、Matilde Fondo、Ana García-Deibe、Antonio Sousa-Pedrares、Oscar Piro
DOI:10.1039/b008932j
日期:——
The
interaction of 2-pyridinecarboxaldehyde with N-tosyl-1,2-diaminobenzene leads to the isolation of two different
products, 3-[ethoxy(2-pyridyl)methyl]-1-[(4-methylphenyl)sulfonyl]-2-(2-pyridyl)-2,3-dihydro-1H-benzo[d]imidazole}, L1, and 1-[(4-methylphenyl)sulfonyl]-2-(2-pyridyl)-2,3-dihydro-1H-benzo[d]imidazole},
L2, but not to the expected Schiff base 1-[(4-methylphenyl)sulfonamido]-2-[(2-pyridylmethylene)amino]benzene, HL3. Two kinds of complexes, containing the potentially tridentate
and monoanionic [L3]− as a ligand, were obtained by different routes. ML3(p-Tos)(H2O)n complexes
(p-TosH =
p-toluenesulfonic acid; M = Co, Cu, Zn; n
= 1–3) have been isolated by electrolysis of a solution phase composed of L1
and p-toluenesulfonic acid, using metal plates as the anode. Metal complexes of composition ML32(H2O)n
(M = Mn, Co, Cu, Zn; n
= 0–2) were obtained by template synthesis from M(acac)2, 2-pyridinecarboxaldehyde
and N-tosyl-1,2-diaminobenzene. All these compounds have been characterised by elemental analyses, magnetic measurements,
IR, mass spectrometry and, in the case of M = Zn, by 1H NMR spectroscopy. CuL3(p-Tos)(H2O), 1, ZnL3(p-Tos)(H2O), 2, CoL32, 3, CuL32, 4 and ZnL32·2CH3CN, 5, were also crystallographically
characterised.
L1,以及1-[(4-甲基苯基)磺酰基]-2-(2-吡啶基)-2,3-二氢-1H-苯并[d]咪唑},L2,但不是预期的希夫碱 1-[(4-甲基苯基)磺酰氨基]-2-[(2-吡啶亚甲基)氨基]苯,HL3。通过不同的途径,得到了两种含有潜在的三叉单阴离子[L3]-作为配体的配合物。以金属板为阳极,通过电解由 L1 和对甲苯磺酸组成的溶液相,分离出了 ML3(p-Tos)(H2O)n 复合物(p-TosH = 对甲苯磺酸;M = Co、Cu、Zn;n = 1-3)。通过 M(acac)2、2-吡啶甲醛和 N-对甲苯磺酰基-1,2-二氨基苯的模板合成,获得了成分为 ML32(H2O)n(M = Mn、Co、Cu、Zn;n = 0-2)的金属配合物。所有这些化合物都已通过元素分析、磁性测量、红外光谱、质谱以及 1H NMR 光谱(M = Zn)进行了表征。此外,还对 CuL3(p-Tos)(H2O)、1、ZnL3(p-Tos)(H2O)、2、CoL32、3、CuL32、4 和 ZnL32-2CH3CN 5 进行了晶体学表征。