Thermochemistry of bis(eta/sup 8/-cyclooctatetraene)thorium and bis(eta/sup 8/-cyclooctatetraene)uranium

Journal Article · Wed Jul 01 00:00:00 EDT 1987 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:5739584

Kuznetsov, N T; Kir'yanov, K V; Mitin, V A; Sevast'yanov, V G; Bogdanov, V A

In the present paper they report the first determination of the heat of combustion ..delta..H/sub c//sup 0/ of bis(eta/sup 8/-cyclooctatetraene)thorium (thorocene), and also a refinement of the measurement of ..delta..H/sub c//sup 0/ for bis(eta/sup 8/-cyclooctatetraene)uranium (uranocene). These measurements, along with the results of tensimetric experiments, have been used to calculate the standard enthalpies of formation of these compounds both in the condensed and vapor phase, as well as the average dissociation energies of the actinide-cyclooctatetraene bonds. The metal-ligand chemical bonds in these compounds have been found to be among the strongest of the known sandwich compounds. Comparative estimates of the values of the average dissociation energies of all of the bonds in thorocene and uranocene have revealed that the determining factor controlling the thermal destabilization of these molecules is the average carbon-hydrogen bond energy.

• OSTI ID: 5739584
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Vol. 28:6; Other Information: Translated from Radiokhimiya; 28: No. 6, 709-712(Nov-Dec 1986)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CYCLOALKENES
COMBUSTION HEAT
FORMATION FREE ENTHALPY
THORIUM COMPLEXES
URANIUM COMPLEXES
BINDING ENERGY
CARBON
CHEMICAL BONDS
DISSOCIATION ENERGY
FORMATION HEAT
HYDROGEN
ORGANOMETALLIC COMPOUNDS
PYROLYSIS
ACTINIDE COMPLEXES
ALKENES
CHEMICAL REACTIONS
COMPLEXES
DECOMPOSITION
ELEMENTS
ENERGY
ENTHALPY
FREE ENTHALPY
HEAT
HYDROCARBONS
NONMETALS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
REACTION HEAT
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
360603* - Materials- Properties
400800 - Combustion
Pyrolysis
& High-Temperature Chemistry