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Molecules 2003, 8(2), 269-274; doi:10.3390/80200269

Crystal Structure of N,N,N’,N’-tetra-[(3,5-dimethyl-1-pyrazolyl) methyl]-para-phenylenediamine

1, 1, 1, 1, 2, 2, 2, 3 and 1,3,*
1 Département de Chimie, Faculté des Sciences Dhar El Mehraz, 30000 Fès, Morocco 2 CEMES, CNRS, 29, rue Jeanne Marvig, 31055 Toulouse Cedex 04, France 3 Département de Chimie, Faculté des Sciences, 60000 Oujda, Morocco
* Author to whom correspondence should be addressed.
Received: 27 May 2002 / Revised: 10 February 2003 / Accepted: 17 February 2003 / Published: 28 February 2003
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The title compound, molecular formula C30H40N10, crystallizes and exhibits a cisoidal conformation around a central p-phenylenediamine ring suggesting that this bis-tripodal ligand is highly flexible and could be accommodated by many and original metal coordinations. All four five-membered pyrazole rings are identical. The molecule presents an inversion centre that coincides with the phenyl ring centre: pyrazole rings are two-by-two equivalent. The electrostatic spatial intramolecular repulsion between N4 and N5 is probably responsible for this general arrangement. These data emphasize the basic character of nitrogens N4 and N5.
Keywords: Structure; bis-tripod; pyrazole; bis-tridentate; N-ligands; condensation; diamines; flexibility; molecular wires Structure; bis-tripod; pyrazole; bis-tridentate; N-ligands; condensation; diamines; flexibility; molecular wires
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Daoudi, M.; Larbi, N.B.; Benjelloun, D.; Kerbal, A.; Launay, J.P.; Bonvoisin, J.; Jaud, J.; Mimouni, M.; Ben-Hadda, T. Crystal Structure of N,N,N’,N’-tetra-[(3,5-dimethyl-1-pyrazolyl) methyl]-para-phenylenediamine. Molecules 2003, 8, 269-274.

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