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Coordination compounds of manganese(II) with 1,10 phenanthroline

III Thermal studies of pseudohalogenato complexes

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Abstract

TG and DTA of the compounds Mn(phen)2X2 (where X=CN−,CNO−, NCS− and NCSe−), Mn(phen) (NCS)2, Mn(NCS)2 and Mn(NCSe)2 (wherephen=1,10 phenanthroline) are reported and discussed. Decomposition schemes are proposed based on TG and DTA results and, where possible, the analysis and properties of intermediates formed during thermal breakdown. The decomposition of thiocyanate and selenocyanate ligands is observed to lead to an apparent slight increase in sample weight. This phenomenon is discussed in relation to buoyancy changes resulting from the release of sulphur or selenium vapours.

Résumé

On décrit et discute la TG et l'ATD des composés Mn(phén)2X2 (X=CN−, CNO−, NCS− et NCSe−), Mn(phén) (NCS)2, Mn(NCS)2 et Mn(NCSe)2 (oùphén=1,10 phénantroline). On propose des schémas de décomposition à partir des résultats de TG et d'ATD et, si possible, on donne l'analyse et les propriétés des produits intermédiaires formés lors de la décomposition thermique. On a observé que la décomposition des ligands de thiocyanate et de sélénocyanate entraine une faible augmentation apparante du poids du prélèvement. On explique ce phénomène par les variations de poussée résultant du dégagement de vapeurs de soufre ou de sélénium.

Zusammenfassung

TG und DTA Untersuchungen der Verbindungen Mn(phen)2X2 (X=CN−, CNO−, NCS− und NCSe−), Mn(phen) (NCS)2, Mn(NCS)2 und Mn(NCSe)2 (phen =1.10 Phenantrolin) werden beschrieben. Anhand der TG- und DTA-Ergebnisse werden Zerzetzungsschemata vorgeschlagen und wenn möglich, Analyse und Eigenschaften der im Laufe der thermischen Zersetzung entstandenen Zwischenprodukte angegeben. Es wurde beobachtet, da\ die Zersetzung der Thiocyanat- und Selenocyanatliganden zu einer scheinbaren schwachen Zunahme des Probengewichts führt. Dieses PhÄnomen wird im Zusammenhang mit infolge der Abspaltung von Schwefel- oder SelendÄmpfen auftretenden Änderungen des Auftriebs diskutiert.

РЕжУМЕ

пРИВЕДЕНы И ОБсУжДЕН ы ДАННыЕ тг И ДтА Дль сОЕДИНЕНИИ Мп(ФЕН)2х2, М п(ФЕН) (NCS)2, Mn(NCS)2 И Mn(NCSe)2, гДЕ X=CN−, CNO−, NCS−, NCSe− И ФЕН=1.10ФЕНАНтРОлИН. НА ОсНОВАНИИ РЕжУльт АтОВ тг И ДтА пРЕДлОжЕ Ны схЕМы РАжлОжЕНИь И, гДЕ ЁтО пРЕДстАВльлОсь В ОжМОжНыМ, пРОВЕДЕН АН АлИж И ИсслЕДОВАНы сВОИстВ А пРОМЕжУтОЧ-Ных пРОДУктОВ, ОБРАжУУЩИ хсь пРИ тЕРМИЧЕскОМ РАжлОжЕНИИ. РАжлОжЕН ИЕ тИОцИАНАтНОгО И сЕлЕНОцИАНАтНОгО лИ гАНДОВ пРИВОДИт к НЕБ ОльшОМУ УВЕлИЧЕНИУ ВЕсА ОБРА жцА. ЁтО ьВлЕ-НИЕ ОБсУжДЕНО НА ОсНОВЕ п ОплАВкОВых ИжМЕНЕНИ И, ВОжНИкАУЩИх В РЕжУль тАтЕ ВыДЕлЕНИь пАРОВ сЕРы ИлИ сЕлЕНА.

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Authors and Affiliations

  1. School of Chemistry, Brunel University, Uxbridge, Middlesex, England

    C. F. Bell & R. E. Morcom

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  1. C. F. Bell
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  2. R. E. Morcom
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Additional information

We wish to express our thanks to Professor S. C. Bevan for helpful advice, particularly in connection with the buoyancy effect noted for thiocyanate and selenocyanate complexes.

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Bell, C.F., Morcom, R.E. Coordination compounds of manganese(II) with 1,10 phenanthroline. Journal of Thermal Analysis 17, 7–18 (1979). https://doi.org/10.1007/BF02156592

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  • DOI: https://doi.org/10.1007/BF02156592

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