Publication Date:
2011-12-22
Description:
Three new letrozole complexes {[Cu(Le) 4 Cl 2 ] · (H 2 O)} ( 1 ), {[Ni(Le) 4 Cl 2 ] · (H 2 O)}( 2 ) and {[Co(Le) 4 Cl 2 ] · (H 2 O)} ( 3 ) (Le = letrozole = 1-[bis(4-cyanophenyl)methyl]-1,2,4-triazole) were obtained from self-assembly of CuCl 2 , NiCl 2 · 6H 2 O, and CoCl 2 · 6H 2 O with medicine letrozole. All compounds were characterized by IR spectroscopy, elemental, single-crystal as well as powder X-ray diffraction, and thermogravimetric analyses. The analyses of the structures indicate that all crystals belong to monoclinic system, space group C 2/ c , for complex 1 with crystal data a = 34.501(18) Å, b = 12.724(7) Å, c = 16.116(9) Å, β = 114.958(7) °, V = 6414(6) Å 3 , Z = 4, F (000) = 2660, R 1 = 0.0668, wR 2 = 0.1574; for complex 2 , a = 34.769(6) Å, b = 12.7267(18) Å, c = 16.046(2) Å, β = 115.281(3) °, V = 6420.1(16) Å 3 , Z = 4, F (000) = 2656, R 1 = 0.0510, wR 2 = 0.0896; for complex 3 , a = 35.063(8) Å, b = 12.658(3) Å, c = 16.056(4) Å, β = 115.387(3) °, V = 6438(2) Å 3 , Z = 4, F (000) = 2652, R 1 = 0.0528, wR 2 = 0.1205. The local arrangements around central metal atoms (Cu II , Ni II , and Co II ) can be best described as distorted octahedra which are constructed by two chlorine atoms and four monodentate nitrogen atoms from different letrozole ligands. XRD results of 1 – 3 show that all peaks displayed in the measured patterns at room temperature closely match those in the simulated patterns generated from single-crystal diffraction data, indicating single phases of 1 – 3 were formed.
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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