Acta Crystallographica Section C

Crystal Structure Communications

Volume 57, Part 6 (June 2001)


metal-organic compounds



na1508 scheme

Acta Cryst. (2001). C57, 698-701    [ doi:10.1107/S0108270101004231 ]

Polynuclear coordination compounds of alkali metal ions with organic chromophores

R. Centore and A. Tuzi

Abstract: The crystal structures of sodium 4-({4-[N,N-bis(2-hydroxyethyl)amino]phenyl}diazenyl)benzoate 3.5-hydrate, Na+·C17H18N3O4-·3.5H2O, (I), and potassium 4-({4-[N,N-bis(2-hydroxyethyl)amino]phenyl}diazenyl)benzoate dihydrate, K+·C17H18N3O4-·2H2O, (II), are described. The results indicate an octahedral coordination around sodium in (I) and a trigonal prismatic coordination around potassium in (II). In both cases, coordination around the metal cation is achieved through O atoms of the water molecules and hydroxy groups of the chromophore. The organic conjugated part of the chromophore is approximately planar in (I), while a dihedral angle of 30.7 (2)° between the planes of the phenyl rings is observed in (II).

Formula: Na+·C17H18N3O4-·3.5H2O and K+·C17H18N3O4-·2H2O


hkldisplay filedownload file

Structure factor file (CIF format) (344.1 kbytes)
Contains datablock I


hkldisplay filedownload file

Structure factor file (CIF format) (86.5 kbytes)
Contains datablock II


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