Synthesis and electrical properties of CuBr2 complexes with 1,10-phenanthroline monohydrate

Taşcıoǧlu, Sülin, Kakı, Esra and Arı, Mehmet Synthesis and electrical properties of CuBr2 complexes with 1,10-phenanthroline monohydrate Chemical Papers, Vol.62, No. 3, 2008, 260-267

Document type: Článok z časopisu / Journal Article
Collection: Chemical papers  

Author(s) Taşcıoǧlu, Sülin
Kakı, Esra
Arı, Mehmet
Title Synthesis and electrical properties of CuBr2 complexes with 1,10-phenanthroline monohydrate
Journal name Chemical Papers
Publication date 2008
Year available 2008
Volume number 62
Issue number 3
ISSN 0366-6352
Start page 260
End page 267
Place of publication Poland
Publisher Versita
Collection year 2008
Language english
Subject 250000 Chemical Sciences
250200 Inorganic Chemistry
Abstract/Summary Using 1,10-phenanthroline monohydrate and CuBr2 in molar ratios of 1:1 and 2:1, in CH3OH/H2O (ϕr = 1:1), the complexes [(phen)CuBr2]2, (I), and {[(phen)2CuBr]Br·H2O}, (II), have been prepared. The hydrogen bondings and aqua bridges between coordinated and noncoordinated bromides of II have been observed by XRD. Complex II has a triclinic crystal structure with distorted trigonal bipyramidal coordination geometry. Possibilities of ligand exchange with hydroxide or ammonia have been examined in both complexes. While the mononuclear complex II is stable in a refluxed ammonia solution and the complex {[phen)2CuBr]Br·3H2O}, (IV), trihydrate of II, is obtained; the binuclear complex I reacts with the ammonia solution to replace one of its bromides in the subunits with hydroxide to give {[(phen)2Cu2Br2(OH)2]·4H2O}, (III). Structural and electrical properties of the complexes have been investigated by elemental analysis, vibrational and electronic spectroscopy, mass spectrometry, TGA, XRD and the four-point probe method. The temperature coefficients of resistivity and the activation energies of the complexes have also been obtained. All complexes behave as intrinsic semiconductor in the temperature range of 310–440 K.
 
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