Low-Temperature Spectral Observation of the First Six-Coordinate Nitrosyl Complexes of Cobalt(II) meso-Tetratolylporphyrin with Trans Nitrogen Base Ligands

Low-temperature interaction of nitrogen base ligands with layered Co(TTP)(NO) (TTP = meso-tetratolylporphyrinato dianion) as well as its toluene solution leads to the formation of the first six-coordinate species of the general formula (B)Co(TTP)(NO) (where B = piperidine and pyridine). The ν(NO) st...

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Veröffentlicht in:	Inorganic chemistry 2007-03, Vol.46 (5), p.1526-1528
Hauptverfasser:	Kurtikyan, Tigran S, Markaryan, Emil R, Mardyukov, Artur N, Goodwin, John A
Format:	Artikel
Sprache:	eng
Schlagworte:	Cobalt - chemistry Ligands Nitrogen - chemistry Nitroso Compounds - chemistry Organometallic Compounds - chemistry Porphyrins - chemistry Sensitivity and Specificity Spectroscopy, Fourier Transform Infrared - methods Temperature
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container_title	Inorganic chemistry
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creator	Kurtikyan, Tigran S Markaryan, Emil R Mardyukov, Artur N Goodwin, John A
description	Low-temperature interaction of nitrogen base ligands with layered Co(TTP)(NO) (TTP = meso-tetratolylporphyrinato dianion) as well as its toluene solution leads to the formation of the first six-coordinate species of the general formula (B)Co(TTP)(NO) (where B = piperidine and pyridine). The ν(NO) stretching bands of these species appear at lower frequencies compared with the five-coordinate nitrosyl derivative and depend on the nature of the trans axial ligand. The equilibrium constants and enthalpies of formation of these new species are determined. Fairly stable at low-temperature conditions in the solid state, they slowly dissociate the nitrogen base ligands upon warming to restore the five-coordinate nitrosyl complex Co(TTP)(NO).
doi_str_mv	10.1021/ic062070y
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The ν(NO) stretching bands of these species appear at lower frequencies compared with the five-coordinate nitrosyl derivative and depend on the nature of the trans axial ligand. The equilibrium constants and enthalpies of formation of these new species are determined. 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Chem</addtitle><date>2007-03-05</date><risdate>2007</risdate><volume>46</volume><issue>5</issue><spage>1526</spage><epage>1528</epage><pages>1526-1528</pages><issn>0020-1669</issn><eissn>1520-510X</eissn><abstract>Low-temperature interaction of nitrogen base ligands with layered Co(TTP)(NO) (TTP = meso-tetratolylporphyrinato dianion) as well as its toluene solution leads to the formation of the first six-coordinate species of the general formula (B)Co(TTP)(NO) (where B = piperidine and pyridine). The ν(NO) stretching bands of these species appear at lower frequencies compared with the five-coordinate nitrosyl derivative and depend on the nature of the trans axial ligand. The equilibrium constants and enthalpies of formation of these new species are determined. Fairly stable at low-temperature conditions in the solid state, they slowly dissociate the nitrogen base ligands upon warming to restore the five-coordinate nitrosyl complex Co(TTP)(NO).</abstract><cop>United States</cop><pub>American Chemical Society</pub><pmid>17284028</pmid><doi>10.1021/ic062070y</doi><tpages>3</tpages></addata></record>
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subjects	Cobalt - chemistry Ligands Nitrogen - chemistry Nitroso Compounds - chemistry Organometallic Compounds - chemistry Porphyrins - chemistry Sensitivity and Specificity Spectroscopy, Fourier Transform Infrared - methods Temperature
title	Low-Temperature Spectral Observation of the First Six-Coordinate Nitrosyl Complexes of Cobalt(II) meso-Tetratolylporphyrin with Trans Nitrogen Base Ligands
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