Structural studies of mesogenic orthopalladated imine derivatives
- Ciriano, M.A. 3
- Espinet, P. 2
- Lalinde, E. 1
- Ros, M.B. 3
- Serrano, J.L. 3
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1
Universidad de Zaragoza
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2
Universidad de Valladolid
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3
Instituto de Nanociencia y Materiales de Aragón
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ISSN: 0022-2860
Año de publicación: 1989
Volumen: 196
Número: C
Páginas: 327-341
Tipo: Artículo
beta Ver similares en nube de resultadosOtras publicaciones en: Journal of Molecular Structure
Resumen
Structural studies by 1H NMR of 12 orthopalladated complexes of the type: {Pd2(μ-Y)2(C10H21OC6H4C(X)NC6H4R)2} (XH, CH3; YOCOCH3, Cl, Br, SCN; ROC10H21, C10H21) are reported. Although in all cases only the trans isomers of these complexes have been observed, the presence of other types of isomerism has been detected. Thus, the thiocyanate complexes show isomers arising from the relative disposition of the asymmetrical bridging ligands, whereas the acetato-bridged complexes must be a mixture of the D and L enantiomers due to their rigid open-book shape. From the results of different spectroscopic studies (low temperature and selective decoupling) carried out on the ketone-derived imine complex {Pd2(μ-OCOCH3)2(C10H21OC6H4C(CH3)NC6H4C10H21)2} we suggest that a structural distortion due to steric hindrances exists for this compound. © 1989.