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Thermal analysis of metal complexes, III

Investigation of the thermal decomposition of pyridine halide (pseudohalide) mixed complexes and of their decomposition products

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Abstract

On the basis of the thermal investigation of MpynX z mixed complexes (where M=Mn2+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+; py=pyridine; orα-, Β- andγ-picoline; X=Cl, Br, I, OCN, SCN, NO 3 , SO 2−4 ; andn=2,3,4,6;z=1,2), factors influencing the stability of the metal-pyridine-N bond have been determined.

On the basis of the measured magnetic susceptibilities the symmetry of the coordina tion sphere of the central atom has been established in the intermediate products formed by the thermal decomposition of cobalt(II) complexes.

Résumé

On a examiné des complexes du type Mpy n X z (où M=Mn2+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+; py=pyridine,α-,Β- etγ-piccoline; X=Cl, Br, I, OCN, SCN, NO 3 , SO 2−4 ;n=2, 3, 4, 6;z=1, 2) dans le but de déterminer les facteurs ayant une influence sur la stabilité de la liaison métal-pyridine-N. Par mesure des susceptibilités magnétiques, on a pu établir dans la cas des complexes du Co2+ la sphère de coordination de l'atome central pour les phases intermédiaires produites par décomposition thermique.

Zusammenfassung

Aufgrund derivatographischer Untersuchungen von Mischkomplexen des Typs MpynXz (M=Mn2+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+; py=Pyridin,α, Β undγ Piccolin; X=Cl, Br, I, OCN, SCN, NO 3 , SO 2−4 ;n=2, 3, 4, 6;z=1, 2) wurden die die StabilitÄt der Metall-Pyridin-N Bindung beeinflussenden Faktoren geprüft. Durch Messung der magnetischen SuszeptibilitÄten wurde die Symmetrie der KoordinationssphÄre des Zentralatoms des bei der thermischen Zersetzung entstehenden Kobalt(II)-komplexes ermittelt.

РЕжУМЕ

НА ОсНОВАНИИ ИсслЕДО ВАНИИ НА ДЕРИВАтОгРА ФЕ сМЕшАННых кОМплЕксО В МРУnхz (гДЕ M=Мn2+, сО2+, Ni2+, Cu2+, Zn2+, Cd2+; py=пИРИ ДИН, α, Β И γ пИкОлИН; X=Cl, Br, I, OCN, SCN, NO3 , SO 2−4 ; n=2, 3, 4, 6; z=1, 2) Оп РЕДЕльлИ ФАктОРы, ВлИьУЩИЕ НА стАБИльНОсть сВьж И МЕтАлл-пИРИДИН-N. НА О сНОВАНИИ ИжМЕРЕНИь МАгНИтНОИ ВОспРИИМЧИВОстИ Уст АНОВИлИ сИММЕтРИУ кООРДИНАцИОННОИ сФЕ Ры цЕНтРАльНОгО АтОМ А В пЕРЕхОДНых пРОДУкт Ах, ОБРАжОВАННых пРИ тЕРМОРАспАДЕ кОМплЕ ксОВ сО(II).

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Previous paper of the series: G. Liptay, K. Burger, E. Papp Molnár, Sz. Szebeni, F. Ruff: J. Inorg. Nucl. Chem. 31 (1969) 2359.

We are indebted to Miss é. Szabó for technical assistance.

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Liptay, G., Burger, K., Mocsári-Fülöp, é. et al. Thermal analysis of metal complexes, III. Journal of Thermal Analysis 2, 25–36 (1970). https://doi.org/10.1007/BF01911702

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  • DOI: https://doi.org/10.1007/BF01911702

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