/pdf/vapochromism-in-organometallic-and-coordination-complexes-2b95t21sol.pdf

Vapochromism in organometallic and coordination complexes: chemical sensors for volatile organic compounds.

Publisher Summary Tin (Sn) compounds are well-recognized both in basic research and in industrial applications. Tin NMR spectroscopy includes three magnetically active tin isotopes namely, 115Sn, 117Sn , and l19Sn. However, most tin NMR parameters refer to the 119Sn nucleus owing to its properties such as abundance, magnetic moment, and NMR frequency. This chapter describes: (1) the compilation and updation of 119Sn chemical shifts (δ 119Sn) from studies on organotin compound and inorganic tin compounds, (2) indirect nuclear spin-spin couplings, (3) relaxation mechanisms concerning the 119Sn nucleus, and (4) experimental details for 1I9Sn-NMR measurements. It is observed that with modem equipment there are, in principle, no serious experimental difficulties in observing 119Sn resonances either directly or by heteronuclear double resonance. δ 119Sn data, available for all kinds of tin compounds, significantly allows using this parameter in an empirical way in order to find models for the qualitative interpretation of δ 119Sn. This also applies to couplings involving the l19Sn nucleus, which serve as a sensitive tool in the discussion of structure and bonding. All 119Sn-NMR parameters of tin compounds largely concern measurements in the liquid state.

119Sn-NMR Parameters

A. Lanthanum, Yttrium, and Scandium 2126 B. Hafnium, Zirconium, and Titanium 2126 C. Tantalum, Niobium, and Vanadium 2127 D. Tungsten, Molybdenum, and Chromium 2127 E. Rhenium, Technetium, and Manganese 2128 F. Osmium, Ruthenium, and Iron 2128 1. Osmylation 2128 2. Reactions with Zerovalent Compounds 2131 3. Other Addition Reactions 2133 4. Redox Reactions 2134 5. Cocrystallizations 2134 G. Iridium, Rhodium, and Cobalt 2135 1. Adduct Formation with Vaska-Type Complexes, Ir(CO)Cl(PR3)2 2135

/pdf/reactions-of-transition-metal-complexes-with-fullerenes-c60-1hra1tblh6.pdf

Reactions of transition metal complexes with fullerenes (c60, c70, etc.) and related materials

Structural and functional evolution of metallacrowns.

Structurally Diverse pi-Cyclopentadienyl Complexes of the Main Group Elements.

Structural investigations by solid-state carbon-13 NMR. Dependence of |1J(119Sn,13C)| on the methyl-tin-methyl angle in methyltin(IV)s

: O, O-Diethyldithiophosphatotriphenyltin(IV), C22H25O2S2Sn, crystallizes in the triclinic space group P1. The structure was determined by the heavy atom technique from 4838 reflections measured at 138 + or - 2K on an automatic difffractometer using monochromated Mo-K(alpha) radiation, to a final R-value of 0.039. The molecule contains a four-coordinate tin atom and a monodentate dithiophosphate ligand, the first such example of a dithiophosphate ligand which is neither chelating nor bridging.

Phosphoric acid derivatives of tin. 2. Crystal and molecular structure of (O,O'-diethyl dithiophosphato)triphenyltin(IV) at 138 K. A unique monodentate dithiophosphate derivative

Ein verbesserter Syntheseweg fur Pentaphenylcyclopentadienol (1), Pentaphenylcyclopentadienylbromid (2), Pentaphenylcyclopentadien (3), und Pentaphenylcyclopentadienyllithium (4a), die Darstellung von Decaphenylgermanocen (5), -stannocen (6) und -plumbocen (7) sowie von Pentaphenylstannocen (8) wird beschrieben. Die vollstandigen analytische Daten (IR-, Raman-, Rontgenpulver-, NMR-, Massen- und 119mSn-Mosbauer-Spektren) werden angegeben. Es werden 119Sn- und 207Pb-CPMAS-NMR-Messungen von verschiedenen Stannocenen und dem Plumbocen 7 mitgeteilt.



Decaphenylgermanocene, -stannocene, and -plumbocene and Pentaphenylstannocene:Synthesis, Properties, and CPMAS-Metal-NMR Measurements



An improved synthesis is described for pentaphenylcyclopentadienol (1), pentaphenylcyclopentadienyl bromide (2), pentaphenylcyclopentadiene (3), and pentaphenylcyclpentadienyllithium (4a). Decaphenylgermanocene (5), -stannocene (6), and -plumbocene (7) as well as pentaphenylstannocene (8) are prepared. Complete analytical data (IR, Raman, X-ray powder, NMR, mass, and 119mSn-Mosbauer spectra) are given. 119Sn- and 207Pb-CPMAS NMR measurements of various stannocenes and of the plumbocenen 7 are reported for the first time.

Decaphenylgermanocen, -stannocen und -plumbocen sowie Pentaphenylstannocen: Synthese, Eigenschaften und CPMAS-Metall-NMR-Messungen

Germaniumdiiodid, Zinndichlorid bzw. Bleidiacetat reagiert mit Pentabenzylcyclopentadienyllithium (1) unter Bildung von Decabenzylgermanocen (2), Decabenzylstannocen (3) bzw. Decabenzylplumbocen (4). Die luftstabilen Metallocene wurden durch IR-, Raman-, NMR-, 119mSn-Mosbauer- (3) und Massenspektren charakterisiert. Die Rontgenstrukturanalyse der Verbindungen zeigt, das die Ebenen der beiden Cyclopentadienylringe einen Winkel zwischen 31 und 36° einschliesen, und das eine Abschirmung des freien Elektronenpaares am Metallatom jeweils durch drei der zehn Benzylgruppen erfolgt.



Decabenzylgermanocene, -stannocene and -plumbocene. Synthesis and Structure of Air-stable Metallocenes of Main Group IV



Germanium diiodide, tin dichloride, or lead diacetate reacts with pentabenzylcyclopentadienyllithium (1) to give decabenzylgermanocene (2), decabenzylstannocene (3) or decabenzylplumbocene (4), respectively. The air-stable metallocenes were characterized by IR, Raman, NMR, tin-119m-Mossbauer (3), and mass spectroscopy. The X-ray structural analysis shows for all three compounds an angle of 31 to 36° between the planes of the two cyclopentadienyl rings and a shielding of the lone pair of electrons at the metal atom by three of the ten benzyl groups each.

Decabenzylgermanocen, ‐stannocen und ‐plumbocen. Synthese und Struktur von luftstabilen Metallocenen der 4. Hauptgruppe des Periodensystems der Elemente

J. J. Zuckerman

Papers

Structural investigations by solid-state carbon-13 NMR. Dependence of |1J(119Sn,13C)| on the methyl-tin-methyl angle in methyltin(IV)s

Phosphoric acid derivatives of tin. 2. Crystal and molecular structure of (O,O'-diethyl dithiophosphato)triphenyltin(IV) at 138 K. A unique monodentate dithiophosphate derivative

Decaphenylgermanocen, -stannocen und -plumbocen sowie Pentaphenylstannocen: Synthese, Eigenschaften und CPMAS-Metall-NMR-Messungen

Decabenzylgermanocen, ‐stannocen und ‐plumbocen. Synthese und Struktur von luftstabilen Metallocenen der 4. Hauptgruppe des Periodensystems der Elemente

Eine zweite ungewöhnliche Kristallmodifikation von pentabezylcyclopentadienylthallium(I), (PhCH2)5C5Tl