Organometallic compounds 4-

The PRDDO (partial retention of diatomic differential overlap) method is an attempt to get the optimal ratio of accuracy to CPU time. It has been parameterized for the periodic elements through Br, including the 3rd row transition metals. It was parameterized to reproduce ah initio results. PRDDO has been used primarily for inorganic compounds, organometallics, solid-state calculations, and polymer modeling. This method has seen less use than other methods of similar accuracy mostly due to the fact that it has not been incorporated into the most widely used semiempirical software. 

The DCI probe is particularly attractive for samples that are susceptible to thermal decomposition, although it can equally well be used as a general means of introducing samples into the ionisation source, i.e. as an alternative to the direct insertion probe. The types of sample which benefit most from DCI probing are higher-molecular-weight, less-volatile compounds, organometallics, and any thermally sensitive compounds [40,67]. DCI is considered to be a soft ionisation technique. 

A review28 describes compounds of the Pt-group metals including halide, oxide, sulfide, coordination compounds, organometallic compounds, and metal cluster compounds. 

Organo-Aluminium Compounds Organometallic Chemistry", ACS Monograph No. 147 (Editor H. Zeiss). Reinhold, New York, 1960. 

See related ALKYLMETALS See other BENZYL COMPOUNDS, ORGANOMETALLICS... 

Redox reactions are considered as being able to provide versatile and efficient methods for bringing about ring transformations. Transition metal complexes in particular are able to induce or catalyze oxidative or reductive transformations of small ring compounds. Organometallics, such as metal-lacycles derived by the insertion of metal atoms into rings, are involved as key intermediates in many cases, allowing subsequent functionalization or carbon-carbon bond formation. 

Ace advanced topics — take a closer look at nitrogen compounds, organometallic compounds, the Claisen Condensation and its variations, and biomolecules, such as carbohydrates, lipids, and proteins... 

Jiang S, Agoston GE, Chen T, Cabal M-P, Turns E (1995) BF3 Et20-promoted allylation reactions of allyl(cyclopentadienyl)iron(II) dicarbonyl complexes with carbonyl compounds. Organometallics 14 4697 -709... 

An area of current development is the nomenclature of organometallic compounds. Organometallic compounds of Main Group elements can, to a first approximation, be considered to be derivatives of hydrides, and the methods of substitutive nomenclature can be applied. Even then, the accessibility of different oxidation states, as with phosphorus(iii) and phosphorus(v), introduces complications. Transition metal organometallic compounds are even more difficult to treat, and the development of a unified, self-consistent and accepted and applied nomenclature is not easy. Witness the different ways (k, t and italicised symbols) for denoting donor atoms in ligands. 

Organolithium compounds, 2 69 ring stacking, 37 82-92 systems capable of, 37 82-83 uncomplexed, structure, 37 53-54 X-ray crystal structure, 37 48 Organomagnesium halides, 2 71 Organomercury compounds, see Mercury, -carbon compounds Organometallic complexes... 

Sulfur Compounds — Oxygen Compounds—Nitrogen Compounds — Organometallic Compounds Resins and Asphaltenes 40... 

Formally the extrusion of sulfur from episulfides by a thiophilic reagent (phosphorus(m) compounds, organometallic compounds) introduces unsaturation, but the formation of the thiiran and the sulfur extrusion are usually coupled [209-211]. 

Organom etallic Compounds. Organometallic complexes of platinum are usually more stable than palladium complexes. Carbon monoxide complexes of platinum are formed more readily than with palladium. Mononuclear and polynuclear complexes in oxidation states 0 to +2 exist such as... 

See Other BENZYL COMPOUNDS, ORGANOMETALLICS See related ALKYLMETALS... 

Space group Organic compounds Organometallic compounds... 

Getty, A. D. Goldberg, K. I. Reaction of a Pd(II) complex chelated by a tridentate PNC ligand with water to produce a [(PN)Pd(w-OH)]22+ dimer a rare observation of a well-defined hydrolysis of a Pd(II)—aryl compound. Organometallics 2001, 20, 2545—2551. 

Numerous organic compounds, organometallic compounds, cations and anions have been determined by gas chromatography... 

Fig. B.9.1. Molecules such as organic dyes, polycyclic aromatic compounds, organometallic complexes, saccharides, peptides, and polyamides bind to nucleic acids. Two major binding modes are possible — intercalation (left) and groove binding (right).

Mandolesi, S.D., Vaillard, S.E., Podesta, J.C. and Rossi, R.A. (2002) Synthesis of benzene- and pyridinediboronic acids via organotin compounds. Organometallics,... 

Mendoza-Ferri M-G, Hartinger CG, Eichinger RE, Stolyarova N, Severin K, Jakupec MA, Nazarov AA, Keppler BK (2008) Influence of the spacer length on the in vitro anticancer activity of dinuclear ruthenium-arene compounds. Organometallics 27 2405-2407... 

W. D. Jones, and F. J. Feher, Alkane Carbon-Hydrogen Bond Activation by Homogeneous Rhodium(I) Compounds, Organometallics 2, 562-563 (1983). 

In addition to oxidation of organic compounds, organometallic compounds such as tributyl tin (TBT) have been shown to be readily degraded by ferric iron-mediated photochemical processes [23]. Photolysis of low ppm solutions of TBT resulted in almost complete conversion to inorganic tin within 24 hours with a 97% yield of CO2 obtained over long (> 40 h) irradiation times. GC-FID analysis indicated the formation of di- and monobutyl tin as... 

Keywords. Electrospray ionization, Ion-molecule chemistry, Transition-metal coordination compounds, Organometallic catalysis... 

Voskoboynikov, A.Z., Parshina, I.N., Shestakova, A.K. et al. (1997) Reactivity of lanthanide and yttrium hydrides and hydrocarbyls toward organosilicon hydrides and related compounds. Organometallics, 16, 4041. 

---