کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1306880 975109 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nickel(II) complexes stabilized by bis[N-(6-pivalamido-2-pyridylmethyl)]benzylamine: Synthesis and characterization of complexes stabilized by a hydrogen bonding network
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Nickel(II) complexes stabilized by bis[N-(6-pivalamido-2-pyridylmethyl)]benzylamine: Synthesis and characterization of complexes stabilized by a hydrogen bonding network
چکیده انگلیسی

Intramolecular hydrogen bonds in metalloproteins are key in directing reactivity yet these effects have been difficult to achieved in synthetic systems. We have been developing a synthetic system that uses hydrogen-bonding interactions to modulate the secondary coordination around a transition metal ion. This was accomplished with the ligand bis[N-(6-pivalamido-2-pyridylmethyl)]benzylamine (H2pmb), which contains two carboxyamido units appended from pyridine rings. Several nickel complexes were prepared and structurally characterized. In particular, we found that the appended carboxyamido groups either provide intramolecular H-bond donors or can be converted to bind directly to a metal center. We established that the complex NiIIH2pmb(Cl)2 can be sequentially deprotonated with potassium tert-butoxide, causing coordination of the carboxyamido oxygen atoms and concomitant loss of the chloro ligands. The chloro ligands were also removed with silver(I) salts in the presence of acetate ions and the complex NiIIH2pmb(κ2-OAc)(κ1-OAc) was isolated, in which an intramolecular H-bonding network occurs between the H2pmb ligand and the coordinate acetato ligands.

The control of the primary and secondary coordination spheres is illustrated using a new multidentate ligand containing carboxyamidopyridyl groups.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Inorganica Chimica Acta - Volume 363, Issue 12, 15 October 2010, Pages 2728–2733
نویسندگان
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