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Crystal structure analysis of {bis-2,6-(3,5-dimethylprazolyl) pyridine-dicyanato}copper(II)monohydrate

✍ Scribed by C. Arıcı; D. Ülkü; R. Kurtaran; Ü. Ergun; O. Atakol


Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
149 KB
Volume
41
Category
Article
ISSN
0232-1300

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✦ Synopsis


A mononuclear copper(II) complex, [Cu(dmpp)(OCN) 2 (H 2 O)], was synthesized using 2,6-bis (3,5dimethylpyrazolyl) pyridine (dmpp) and cyanate anion (OCN), and characterized by single crystal X-ray diffraction. The coordination around the Cu atom is a distorted square-pyramid involving three N atoms from the dmpp ligand and one N atom from OCN at the basal plane. The O atom of the OCN group is located at the apical position.The Cu atom is located 0.2782(1) Å above the basal plane. The Cu atom is coordinated by different donor atoms of the OCN groups. The complex crystalizes in monoclinic space group P2 1 /n, with unit cell dimensions a= 12.4413(12), b=11.1457(13), c=14.2203(12) Å, β=108.817(3)°, V= 1866.5(3) Å 3 . The cell containes 4 molecules. In the crystal, there are three intermolcular and three intramolecular hydrogen bonds interactions. The Cu atom and crystal water O interactions is 5.574 Å.


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Synthesis of the pentadentate ligand 2,6-bis(3-carboxy-1,2-dimethyl-2-azapropyl)pyridine yields a mixture of the racemic and meso-isomers which it was difficult to separate by column chromatography. When the cationic Co(II1)-complex of this ligand was crystallized with hexafluorophosphate as anion,