کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1334481 1500258 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thiosemicarbazonecopper(II) compounds with halide/hexafluorosilicate anions: Structure, water clusters, non-covalent interactions and magnetism
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Thiosemicarbazonecopper(II) compounds with halide/hexafluorosilicate anions: Structure, water clusters, non-covalent interactions and magnetism
چکیده انگلیسی

New thiosemicarbazonecopper(II) compounds with formulae [{Cu(L′)Cl}2] 1, [{Cu(L′)I}2] 2, [{CuL(H2O)}2](SiF6)·4H2O 3, [{Cu(L′)(H2O)}2][Cu(L′)(H2O)2]2-(SiF6)2·8H2O 4, Cu(HL)(SiF6)·4H2O 5, {Cu(HL)(H2O)(SiF6)}n·nH2O 6 and Cu(HL′)(SiF6)·3H2O 7 have been synthesized and characterised, (HL = 2-pyridinecarbaldehyde thiosemicarbazone, and HL′ = 2-pyridinecarbaldehyde 4N-methylthiosemicarbazone). X-ray structural analyses on 1, 2, 3, 4 and 6 reveal that π–π stacking, anion-π and hydrogen bond interactions are present. The latter gives raise to helical chains (3) and hexameric clusters (4) of water molecules. The formation of S-bridged or X-bridged dimers is discussed. The magnetic properties of compounds 1–4 are shown. The influence of the electronegativity of the ancillary ligands, the anionic vs. neutral nature and the substituents in the thiosemicarbazone, together with the absence of inversion centres are studied in the S-bridged dimers, as models for other [Cu2(μ-SR)2] magnetic systems.

The influence of non-covalent interactions in the structural features of new thiosemicarbazonecopper(II) compounds derived from pyridine-2-carbaldehyde thiosemicarbazone (HL) and pyridine-2-carbaldehyde 4N-methylthiosemicarbazone (HL′) is discussed. Parameters involved in their magnetic behaviours are analysed and compared with those in other [Cu2(μ-SR)2] magnetic systems.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 81, 15 October 2014, Pages 675–686
نویسندگان
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