Organometallic thorium

Bilinear chemometrics methods, 6 39-57 Billet products, titanium, 24 858 Bill of Material, 15 460, 470 Bills of lading, 25 330 Bimetal complexes, 16 88 Bimetallic deactivation processes, 16 93-94 Bimetallic fluorides, 15 396 Bimetallic metal nitrides, 17 199 Bimetallic organometallic uranium complexes, 25 442 Bimetallic organometallic thorium complexes, 24 773-774... 

Bimetallic Complexes. There are two types of bimetallic organometallic thorium complexes those with, and those without, metal—metal interactions. Examples of species containing metal—metal bonds are complexes with Fe or Ru carbonyl fragments. Cp ThX(CpRu(CO)2), where X = Cl or I, and Cp 3Th(CpM(CO)2), where M = Fe or Ru, have both been prepared by interaction of Cp2ThX2 or Cp ThCl [62156-90-5], respectively, with the anionic metal carbonyl fragment. These complexes contain very polar metal—metal bonds that can be cleaved by alcohols. 

Carbonyl insertion into the metal-hydrogen bond of an organometallic thorium(IV) compound is successful when there are bulky substituents on the alkoxide group ... 

Whereas CP2MX2 compounds are ubiquitous ia early transition-metal organometallic chemistry, the thorium analogues are rather unstable. 

H. U. Borgstedt and H. Wedemeyer, eds., Gmelin Handbook of Inorganic and Organometallic Chemistry, Thorium, Suppl Hoi B2, Alloys of Thorium with... 

The surface organometallic chemistry of thorium and uranium has been pioneered and developed by Marks et al. since the mid-1980s [3]. In contrast to... 

Coordination Complexes. The coordination and organometallic chemistry of thorium is dominated by the extremely stable tetravalent ion. Except in a few cases where large and sterically demanding ligands are used, lower thorium oxidation states are generally unstable. An example is the isolation of a molecular Th(III) complex [107040-62-0], Th[t -C5H3(Si(CH3)3)2]3 (25). Reports (26) on the synthesis of soluble Th(II) complexes, such as... 

Not every actinide element has known or well-developed organometallic chemistry. By far the most research has been done on thorium and uranium compounds, a consequence of favorable isotope-specific nuclear properties and, at least until recently, the commercial availability of key starting materials such as Th metal, anhydrous ThCLi, U metal, and anhydrous UCL. Thorium chemistry is dominated by the -F4 oxidation state and has some similarities to the chemistry of the heavier group 4 metals. For uranium, one can access oxidation states from d-3 to 4-6 in organic media. Although there are some similarities to the chemistry of the heavier group 6 elements, for example, tungsten, there are also some remarkable differences made possible by the availability of the 5f valence orbitals. 

Much new information about compounds of the lower oxidation states of uranium and thorium has accumulated during the last decade, and the rapid development of the organometallic chemistry of these elements has enhanced interest in this topic. 

For thorium and the organometallic compounds, a different policy has been followed. The literature in these areas is limited and contains sufficient discrepancies to justify an attempt at complete coverage. 

The organometallic chemistry of actinides, ignored in the early development of the field, is currently receiving a great deal of attention.In many instances the chemistry of this group of elements is unlike that of the transition metals. For example, it has been shown that a thorium hydride, in contrast to the manganese hydride shown above, does undergo CO insertion. 

Inorganic, coordination and organometallic compounds of thorium, uranium and plutonium... 

Not every actinide element has known or well-developed organometallic chemistry. By far the most research has been done on thorium and uranium compounds, a consequence of favorable isotope-specific nuclear properties and, at least until recently, the commercial availability of key starting materials such as Th metal, anhydrous ThCH, U metal, and anhydrous Thorium chemistry is dominated... 

Ditz, R., Sarbas, B., Schubert, P., Natural Occurrence Minerals (excluding silicates), Gmelin s handbook of inorganic and organometallic chemistry. Thorium, Supplement Ala, p. 391, Springer-Verlag, Berlin, (1990). 

That such monohapto organometallics are not unique to uranium was demonstarted by the high yield synthesis of the thorium (IV) analogs (Reaction 2) (16,17). These complexes have even greater thermal stabil-... 

---