کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1305674 1499174 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bis- and tris-chelates of NiII, CuII, CoII and FeIII bound to N,N-dialkyl/alkyl aryl-N′-benzoylthiourea ligands
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Bis- and tris-chelates of NiII, CuII, CoII and FeIII bound to N,N-dialkyl/alkyl aryl-N′-benzoylthiourea ligands
چکیده انگلیسی


• X-ray crystal structures of four complexes proved the orientation of the ligands.
• Only mononuclear bis- and tris-chelates complexes were obtained.
• Tautomerization resulted keto-thiol form of the ligands for metal ion binding.

Bis- and tris-chelates (1–5) of Ni(II), Cu(II), Fe(III) and Co(II) with two O,S donor substituted benzoylthiourea based ligands 3,3-diethyl-1-benzoylthiourea (HL1) and 3-methyl-3-phenyl-1-benzoylthiourea (HL2) have been synthesized and structurally characterized by X-ray crystallography. The keto-thione form of the free ligands transform to the keto-thiol form during coordination through neutral O and anionic S atoms. Crystallographic characterizations with supportive spectroscopic signatures confirm the cis-conformation in bis-chelates and facial binding to the tris-chelates.

Benzoylthiourea based O,S donor ligands showed preference for cis- and fac-isomers for bis- and tris-chelates of 3d metal ions with keto-imine-thiol tautomerization.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Inorganica Chimica Acta - Volume 414, 1 April 2014, Pages 127–133
نویسندگان
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