59391-85-4Relevant articles and documents
Thorocene adducts of the neutral 2,2′-bipyridine and its radical anion. Synthesis and crystal structures of [Th(η8-C 8H8)2(κ2-bipy)] and [Th(μ-η8:η5-C8H8) 2(κ2-bipy)K(py)2]∞
Berthet, Jean-Claude,Thuéry, Pierre,Ephritikhine, Michel
, p. 526 - 533 (2014)
Thorocene [Th(Cot)2] (Cot = η8-C 8H8) readily reacts with 2,2′-bipyridine to give [Th(Cot)2(κ2-bipy)], which has an unusual bent geometry. This compound is rapidly reduced by KC8 into the anionic derivative [(Th(Cot)2(κ2-bipy)]-. X-ray diffraction studies suggest the latter to be a Th(IV) compound with the bipyridyl radical anion. These complexes are rare examples of bent actinocene [An(Cot)2(L)]q- (q = 0, 1; An = actinide) and bipyridine-containing thorium species.
Heats fo Formation of Solvated Annulene and Substituted Azaannulene Dianions
Stevenson, Gerald R.,Schock, Laurel E.,Reiter, Richard C.
, p. 5417 - 5419 (2007/10/02)
It was found that the heat of solution of the potassium salt of the cyclooctatetraene (COT) dianion in tetrahydrofuran (-11.1 kcal/mol) measured calorimetrically is very different from the heat of solution determined from solubility data.This is attributed to the existence of a partially solvated solid salt (K+2COT2-*nTHF), which is the form of the COT dianion lowest in energy yet generated.This stable form of the annulene dianion is lower in energy by 393.5 kcal/mol than the gas-phase dianion with two potassium cations.Both solvation and lattice effects are rsponsible for this tremendous stabilization.Substitution of a nitrogen atom for one of the carbon atoms in the eight-member ring system results in an increase in the energy of the THF solvated dianion relative to the metal and neutral organic compound due to an increase in the electron-electron repulsion energy in the dianion.
