Title Anions Research Articles

ChemInform Abstract: Trisubstituted Heteropolytungstates as Soluble Metal Oxide Analogues.

AbstractThe title anions have been synthesized from their lacunary precursors (I) and (IV), and various K+, (Bu4N)+, and (Me4′N)+ salts have been iso‐ lated in up to 98% yield (see scheme).

ChemInform Abstract: Chloroselenates(IV): Synthesis, Structure, and Properties of (As(C6H5)4)2Se2Cl10 and (As(C6H5)4)Se2Cl9.

AbstractThe title anions SeZCEJ and Se2C19′ are prepared as the first dinuclear haloselenates(IV) by the reaction of (SeCl4)4 with stoichiometric quantities of Chloride ions in POCl3 solutions and isolated as AsPhI salts (I) and (II).

ChemInform Abstract: Synthesis and Characterization of the Polyoxothioanions TaW5O18S3‐ and NbW5O18S3‐.

AbstractThe title anions (IIIa), (IIIb) are prepared by introducing sulfur into the polyoxoanions (Ia), (Ib).

ChemInform Abstract: 17O NMR Spectroscopy of Polyoxometalates. Part 3. Mechanistic Polyoxoanion Chemistry: Intramolecular Rearrangements of the α‐Mo8O264‐, C6H5AsMo7O254‐, and (C6H5As)2Mo6O244‐ Anions.

AbstractThe dynamic behavior of the title anions (I) as tetrabutylammonium salts in CH3CN has been studied by using variable‐temp.

ChemInform Abstract: Synthesis and Structure of the [(η5‐C5H5)Ti(Mo5O18)]3‐ and [(η5‐C5H5)Ti(W5O18)]3‐ Anions.

AbstractThe title anions are obtained by the demonstrated reactions and are isolated as the NBu4‐salts (II).

Reactions of α- or γ-phenylthio substituted extended enolate anions derived from esters

The title anions are alkylated and acylated (α series only) exclusively at the α position. The α-phenylthio products give γ-phenylthio compounds by the [1,3]PhS shift and the PhS group may be removed from the products in a number of ways.

NMR Studies of Picolyl-type Carbanions. VI. Anions Produced by Reactions of Methyl-substituted Quinolines and Isoquinolines with Butyllithium

Abstract The 13C and 1H NMR spectra have been observed for the title anions with lithium as a counter ion in polar solvents. Two kinds of anions are formed by lithium-proton exchange and addition of butyllithium. The charge distributions in the anions are discussed in terms of the σ-included ω-HMO method. The former anions can be regarded as picolyl-type carbanions, but the latter ones are ionic species having two of three basic characteristics on picolyl-type carbanions.

Schwingungseigenschaften der XF6 3- Anione (mit X = AI, Ga, In, TI)

Abstract The principal force constants for the title anions have been calculated using the GVFF. Mean amplitudes of vibration, at different temperatures are also estimated. The results are briefly discussed and some comparisons with related species are made

Abnormal alkylation of N-benzylidene-α-aminoester anions with α-haloesters

The title anions, when α-alkyl substituted, alkylate selectively in the γ-position with hindered α-bromoesters. A lower degree of hindrance in either or both reactants tends to favour α-alkylation.

HMPA-Mediated conjugate addition of alkyl- and phenylthioallyl anions to cyclopentenone

One equivalent of HMPA induces 1,4-addition of the title anions predominantly through the α -position to cyclopentenone in THF at −78°. In THF alone irreversible addition takes place to give mixtures comprising largely α and γ -1,2 products.

Mittlere Schwingungsamplituden der Tetrafluorooxohalat(V)-Anione: ClF4O?, BrF4O? und IF4O?

Mean amplitudes of vibration of the title anions have been calculated in the temperature range between 0 and 1,000 K, using recently reported spectroscopic data. The results are briefly discussed and some comparisons with related species are made.