Reactivity of [Co4(CO)12]. Synthesis and characterization of tetracobalt carbonyl anions of general forumla [Co4(CO)11X]?

Autor:	Alessandro Ceriotti, Dario Braga, Giuliano Longoni, Paolo Chini, Stefano Campanella, Vincenzo G. Albano
Rok vydání:	1980
Předmět:	Sodium Inorganic chemistry Halide chemistry.chemical_element Propylamine Monoxide General Chemistry Medicinal chemistry Decomposition chemistry.chemical_compound chemistry Ammonium Reactivity (chemistry) Phosphonium
Zdroj:	Journal of the Chemical Society, Dalton Transactions. :1816
ISSN:	1364-5447 0300-9246
DOI:	10.1039/dt9800001816
Popis:	Salts of the green-brown anions [Co4(CO)11X]–(X = Br, I, or SCN) have been obtained at –70 °C starting from [Co4(CO)12] and tetrasubstituted ammonium ([NEt4] Br or [NEt4]I) or phosphonium {[PMePh3]Br, [N(PPh3)2]I, or [N(PPh3)2][SCN]} salts. Using sodium alkoxides or propylamine, formation of purple-red solutions containing, on the basis of the i.r. spectra, similar monosubstituted anions (X = COOMe, COOPri, or CONHPrn) has been observed. The transformation of [Co4(CO)12] into [Co2(CO)8] has been studied in PriOH at room temperature under cabron monoxide. The considerable acceleration of the rate of this reaction by halide ions is in agreement with the ready decomposition observed for all the [Co4(CO)11X]– anions in Lewis-base solvents.
Databáze:	OpenAIRE
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