Published by De Gruyter

Volume 54 Issue 5

Issue of Zeitschrift für Naturforschung B

Contents
Journal Overview

June 2, 2014

Chemische Reaktionen in Salzschmelzen, XXI. Titan-vermittelte Synthese von Silanen in Chloroaluminat-Schmelzen / Chemical Reactions in Molten Salts, XXI. Titanium Mediated Synthesis of Silanes in Chloroaluminate Melts

Hans Liesenhoff, Wolfgang Sundermeyer

Page range: 573-576

Abstract

Silanes of technical interest as starting compounds for semiconducting materials or hydrosilylation reactions, (CH 3 ) x SiH 4-x (x = 0, 1,2, 3), are obtained by direct hydrogenation of the corresponding chlorosilanes in the presence of various interstitial hydrides of transition metals (preferably of titanium), which are generated in situ in chloroaluminate melts, and aluminum as a halogen acceptor.

June 2, 2014

Hydrolytische Bildung von Perchlorsiloxanen / Formation of Chlorosiloxanes by Hydrolysis

Heike Quellhorst, Andreas Wilkening, Nicola Söger, Michael Binnewies

Page range: 577-582

Abstract

During the reaction of Si 2 OCl 6 with H 2 O in the gas phase the intermediate Si 2 OCl 5 OH has been observed by mass-spectrometry. Reactive intermediates like this are responsible for the formation of higher chlorosilanes by slow hydrolysis reactions of chlorosilanes and -siloxanes. Reaction products of inter- and intramolecular condensation reactions have been observed by GC-MS-methods.

June 2, 2014

Umsetzung von Cyclopentadienylmetallcarbonylen mit Thionylhalogeniden - Neue Synthese halogenoverbrückter CpCo-Komplexe / Reaction of Cyclopentadienyl Metal Carbonyles with Thionylhalides - New Synthesis of Halogeno-Bridged CpCo Complexes

Carola Stoll, Ingo-Peter Lorenz, Kurt Polbom, Erich Friedrich Paulus

Page range: 583-590

Abstract

The reaction of Cp*Co(CO) 2 with thionylchloride in hexane affords the doubly bridged dimer (Cp*CoCl 2 ) 2 . Whereas the same reaction in more polar solvents such as CH 2 Cl 2 or thf gives the triply bridged dinuclear cations in the salt [(Cp*Co) 2 (μ-Cl) 3 ] 2 [Co 2 Cl 6 ], no influence of the solvent is observed in the reaction of Cp*Co(CO) 2 with thionylbromide, which results in the formation of the neutral dimer (Cp*CoBr 2 ) 2 . The X-ray structure analysis of (Cp*CoBr 2 ) 2 shows two edge-sharing octahedra, while that of [(Cp*Co) 2 (μ-Cl) 3 ] 2 [Co 2 Cl 6 ] shows two facesharing octahedra in the cation and two edge-sharing tetrahedra in the anion.

June 2, 2014

Die Oxochlorovanadate PPh₄[VOCl₃OH], PPh₄[VOCl₄], (PPh₄ )₂ [VOCl₄ ]·2CH₃CN und (PPh₄)₂[VOCl₄]·CH₃CN mit auffälligen Abweichungen von der quadratisch-pyramidalen Anionenstruktur / The Oxochlorovanadates PPh₄[VOCl₃OH], PPh₄[VOCl₄], (PPh₄ )₂ [VOCl₄ ]·2CH₃CN and (PPh₄)₂[VOCl₄]·CH₃CN with Remarkable Deviations from the Square-Pyramidal Anion Structure

Andrea Noll, Susanne Rabe, Ulrich Müller

Page range: 591-596

Abstract

Starting from vanadium which was not free of oxide, VCl 4 was prepared; its reaction with PPh 4 Cl in the presence of K 2 S 5 in dichloromethane yielded PPh 4 [VOCl 3 OH]. From V 2 S 5 , PPh 4 Cl and S 2 Cl 2 in acetonitrile, sulfur crystallized first, then PPh 4 [VOCl 4 ], and then (PPh 4 ) 2 [VOCl 4 ]·4CH 3 CN. Upon standing with the mother liquor at -18°C, the latter was converted to (PPh 4 ) 2 [VOCl 4 ]·2CH 3 CN. According to its X-ray crystal structure determination, PPh 4 [VOCl 3 OH] (space group Pbca, a = 1105.5, b = 1920.8, c = 2242.8 pm, Z - 8) has nearly square-pyramidal anions that are associated to chains by 0-H⋯C1 bridges. PPh 4 [VOCl 4 ] is isotypic with AsPh 4 [VOCl 4 ] and has strictly square-pyramidal anions (space group P4/n, a = 1254.0, c = 765.0 pm, Z = 2). In (PPh 2 ) 2 [VOCl 4 ]·4CH 3 CN (space group P1̄, a = 1281.3, b = 1276.6, c = 1841.5 pm, α = 84.11°, β= 83.96, γ = 64.31°, Z = 2) the square pyramid of the VOCl 4 2- ion is distorted towards a trigonal-bipyramidal shape (C 2v symmetry) having trans-ClVCl angles of 145.88° and 156.87° and O=V-Cl angles of 107° and 101.6°. In (PPh 4 ) 2 [VOCl 4 ]·2CH 3 CN (space group P1, a = 1017.1, b = 1029.3, c = 2416.0, α = 77.74°, ß = 79.99°, γ = 78.94°, Z = 2), the VOCl 4 2- structure is even closer to trigonal-bipyramidal, with trans-ClVCl angles of 133.25° and 165.80° and 0=V-Cl angles of 113.3° and 97°.

June 2, 2014

S-, X-, Q- und W-Band-Pulver-EPR-Untersuchungen an Tetra-n -butylammonium-bis( 1,2-dicyanoethen-1,2-dithiolato)aurat(II), [(n-C₄H₉)₄N]₂[Au^II(mnt)₂] / S, X, Q and W Band Powder-EPR Investigations on Tetra-n-butylammoniumbis( 1,2-dicyanoethylene-1,2-dithiolato)aurate(II), [(n-C₄H₉)₄N]₂ [Au^II(mnt)₂]

Lars Ihlo, Reinhard Stößer, Wulf Hofbauer, Rolf Böttcher, Reinhard Kirmse

Page range: 597-602

Abstract

Powder-EPR studies at T = 295 K and T = 12 K on the unstable gold(II) complex [(n- C 4 H 9 ) 4 N] 2 [Au II (mnt) 2 ] diamagnetically diluted by the corresponding Ni II complex are reported. Due to (i) the small anisotropy of the g and the 197 Au hyperfine tensor A Au , and (ii) the large 197 Au quadrupole interaction the powder spectra possess a very complex pattern. Using different EPR frequencies - S band (2.4 GHz), X band (9.5 GHz), Q band (35 GHz) and W band (94 GHz) - the spectra could be analyzed successfully. All spectra were simulated with a computer program which diagonalizes the spin-Hamiltonian matrix exactly.

June 2, 2014

Unerwartete Reaktionsprodukte bei der Umsetzung von Mesitylmagnesiumbromid mit Arsentribromid / Unexpected Products from the Reaction of Mesitylmagnesium Bromide and Arsenic Tribromide

Heinrich Nöth, Ralf Waldhör

Page range: 603-608

Abstract

Irrespective of the ratio of the reactands AsBr 3 and mesMgBr (mes = mesityl), two products are formed in THF solution: dimesitylarsenic bromide and a magnesium bromoarsenate of composition MgAs 5 Br 17 · n THF. The latter, on crystallization from acetonitrile, yields [Mg(NCMe) 4 (THF) 2 ][As 3 Br 11 ]. The anion of this salt can be described as derived from three face sharing AsBr 6 octahedra. The lone pair of electrons at the As atoms is stereochemically not active.

June 2, 2014

1.3.5-Triazin-2,4,6-trisulfenyltrichlorid: Synthese, Eigenschaften und Reaktionsverhalten / 1.3.5-Triazine-2,4,6-trisulfenyltrichloride: Synthesis, Properties and Reactions

Robert Tripolt, Siegfried Schmuck, Edgar Nachbaur

Page range: 609-616

Abstract

Various routes and improved experimental conditions for the synthesis of 1,3,5-triazine-2,4,6- trisulfenyltrichloride are reported and its reaction with water, alcohols, ammonia, and acetone investigated. The formation of the monomeric pseudohalogen halide NCS-C1 by degradation of the title compound under mass-spectrometry conditions has been observed.

June 2, 2014

Verdampfungsverhalten von Lanthantrihalogeniden / Evaporation Behaviour of Lanthanum Trihalides

H. Oppermann, A. Morgenstern

Page range: 617-623

Abstract

The evaporation of LaCl 3 , LaBr 3 and Lal 3 was investigated in closed tubes under argon atmosphere and correlated with data in the literature. The enthalpies and entropies of evaporation were derived from the temperature functions of pressure: ΔH°(v, LaCl 3 , T) = 48,5 ± 2 kcal/mol, ΔS°(v, LaCl 3 , T) = 22,0 ± 3 cal/K-mol ΔH°(v, LaBr 3 , T) = 48,0 ± 2 kcal/mol, ΔS°(v, LaBr 3 , T) = 24,0 ± 2 cal/K-mol ΔH° (v , Lal 3 , T) = 49,5 ± 2 kcal/mol, ΔS°(v, Lal 3 ,T) = 29,0 ± 2 cal/K-mol

June 2, 2014

Synthese und Molekülstruktur des [α-(Dichlormethylsilyl)ethyl]- dichlorboran-dimethylsulfid / Synthesis and Molecular Structure of [α-(Dichloromethylsilyl)ethyl]- dichloroborane-dimethylsulfide

Lutz Ruwisch, Ralf Riedel, Uwe Klingebiel, Mathias Noltemeyer

Page range: 624-626

Abstract

[α-(Dichloromethylsilyl)ethyl]-dichloroborane-dimethylsulfide has been synthesized by the reaction of dichloromethylvinylsilane with dichloroborane-dimethylsulfide and its molecular structure determined by single crystal X-ray diffraction and by spectroscopic methods. Following the Markovnikov rule, a chiral methine group is formed as a bridge between silicon and boron.

June 2, 2014

Organogallitimamide: Synthese und Kristallstrukturen von [ⁱPr₂GaN(H)^tBu]₂ und [Mes(Cl)GaN(H)^tBu]₂ / Organogallium Amides: Synthesis and Crystal Structures of [ⁱPr₂GaN(H)^tBu]₂ und [Mes(Cl)GaN(H)^tBu]₂

Mike R. Kopp, Thomas Kräuter, Anahita Dashti-Mommertz, Bernhard Neumüller

Page range: 627-631

Abstract

[ i Pr 2 GaN(H) t Bu] 2 (1) and [Mes(Cl)GaN(H) t Bu] 2 (2) can be synthesized by the metathesis reaction of i Pr 2 GaCl and MesGaCl 2 with one equivalent of LiN(H) t Bu, respectively. 1 and 2 were characterized by NMR, IR and MS techniques as well as by X-ray structure analyses. 1 and 2 consist of centrosymmetric dimeric molecules with a Ga 2 N 2 skeleton. According to cryoscopic measurements in benzene, both amides are dimeric in solution, too.

June 2, 2014

α-Dicarbonylmonoxime als Nucleophile und Nachbargruppen / α-Dicarbonylmonoximes as Nucleophiles and Neighbour Groups

Hans Möhrle, Georg Keller

Page range: 632-642

Abstract

The α-dicarbonylmonooximes 1 and 11 do not react as simple “CH-acidic-compounds” in the Mannich condensation. In a concerted reaction with aminals in absolute dioxane they give rise to the products 4a - e and 12a - e with better practicability and much higher yields compared with the conventional method. The Mannich bases with a cyclic amine part show in the dehydrogenation, using mercury-EDTA, a neighbouring group participation of the oxime in type 4 and of the oxime or amide function in 12 yielding cyclized products. For the reaction a plausible mechanism is proposed.

June 2, 2014

Polysulfonylamine, CXII. Neues aus der Festkörperchemie der 2-Pyridone: Isolierung und Röntgenstrukturen von Bis(2-pyridon)hydrogen(I)- und Bis(6-methyl-2-pyridon)hydrogen(I)-dimesylamid / Polysulfonylamines, CXII. A Novel Solid-State Aspect of 2-Pyridones: Isolation and X-Ray Structures of Bis(2-pyridone)hydrogen(I) and Bis(6-methyl-2-pyridone)hydrogen(I) Dimesylamides

Karna Wijaya, Oliver Moers, Armand Blaschette, Peter G. Jones

Page range: 643-648

Abstract

The compounds (2-pyridone) 2 H + (MeSO 2 )2N - (1, monoclinic, space group P2 1 /n ) and (6- methyl-2-pyridone) 2 H + (MeSO 2 ) 2 N - (2, triclinic, P1) crystallize selectively and in good yields when the parent 2-pyridones (2-hydroxypyridines) are treated with the strong NH acid dimesylamine in acetonitrile or acetone. The corresponding 2-hydroxypyridinium salts could not be obtained. In the unprecedented crystal structures of 1 and 2, two pyridone units are linked by a proton to form very short and approximately symmetric O⋯H + ⋯O hydrogen bonds, the adjacent C-O distances being appreciably elongated as compared to “free” pyridones [1: O ⋯ O 241.8(2), C -O 127.8(3) and 129.1(2) pm; 2: O ⋯ O 243.8(2), C -O 128.1(2) and 129.2(2) pm]. In both crystal packings, the homoconjugate cations and the dimesylamide anions are alternately associated into chains by an N - H ⋯ N “ and an N - H ⋯ O hydrogen bond.

June 2, 2014

A Short and Productive Synthesis of Racemic α-Lipoic Acid

Friedhelm Balkenhohl, Joachim Paust

Page range: 649-654

Abstract

Racemic α-lipoic acid is synthesized in four steps from the base chemicals vinyl ethyl ether and cyclohexanone. The total yield is 40%.

June 2, 2014

A Short and Productive Synthesis of (R)-α-Lipoic Acid

Gerhard Bringmann, Daniela Herzberg, Geo Adam, Friedhelm Balkenhohl, Joachim Paust

Page range: 655-661

Abstract

(R )-α-Lipoic acid is synthesized in seven steps from the base chemicals methyl acetoacetate or Meldrum’s acid and monomethyl adipate. The key steps are the introduction of the stereogenic center by fermentative or homogeneously catalyzed hydrogenation of 3-oxooctanedioic acid diester to (3S)-3-hydroxyoctanedioic acid diester and its regioselective reduction to (6S)-6 ,8-dihydroxyoctanoic acid ester. The overall yield of (R )-α-lipoic acid, starting from 3-oxooctanedioic acid diester, is 40%.

June 2, 2014

5,10,15,20-Tetrakis(diphenylmethyl)porphyrin - A Nonplanar Porphyrin with Intermediate Degree of Ruffling

Steffen Runge, Mathias O. Senge, Karin Ruhlandt-Senge

Page range: 662-666

Abstract

The title compound was prepared by condensation of pyrrole and diphenylacetaldehyde in 16% yield. Based on spectroscopic data, the free base porphyrin exhibits a nonplanar macrocycle in solution with a degree of distortion between that of 5,10,15,20-tetracyclohexylporphyrin and 5,10,15,20-tetra(t-butyl)porphyrin. A crystal structure determination of the cobalt(II) complex reveals a ruffled macrocycle conformation with an average out-of-plane displacement of the meso carbon atoms by 0.55 Å.

June 2, 2014

Synthesis of 3-Amino(alkoxy)-2,4-dioxo-1,3-oxazolidine-5-carboxylates from Tartronic Esters

Thomas Kurz, Detlef Geffken

Page range: 667-673

Abstract

The reaction of tartronic esters (1a-d) with 1,1'-carbonyl-di-(1,2,4-triazole), hydrazines or hydroxylamines produces 3-amino/3-alkoxy(aralkoxy)-2,4-dioxo-1,3-oxazolidine-5-carboxylic esters (5,6) which are structurally related to the fungicides Famoxadone (I) and Chlozolinate (II). Under suitable conditions the carboxylic ester of 6 can be converted to a carboxamide (7), carbohydrazide (8) or carbohydroxamic acid (9).

June 2, 2014

Cyanothioacetamide and its Derivatives in Heterocyclic Synthesis: A New Route for the Synthesis of Several Pyridine and Thieno[2,3-b]pyridine Derivatives and their Biological Evaluation

Sanaa M. Eldin

Page range: 674-680

Abstract

Several new pyridine and thieno[2,3-b]pyridine derivatives were synthesized via the reactions of some pyridinethiones, obtained by the action of acetylacetone on some thiocarboxamidocinnamonitriles, with halogenated esters and ketones. Structures were established based on elemental and spectral data. All the synthesized compounds were tested for their biological activity.

June 2, 2014

Synthese und Struktur von Prolinring-modifizierten Actinomycinen des X-Typs / Synthesis and Structure of Proline Ring Modified Actinomycins of the X-Type

Axel Lifferth, Isabel Bahner, Helmut Lackner, Martina Schäfer

Page range: 681-691

Abstract

The first total synthesis of actinomycins containing L-4-hydroxyproline (1) and the separation and NMR spectroscopic assignment of the regioisomers X Oβ and iso-X Oβ (1c, 1e) are described. The synthetic X Oβ proves, that the oxidized proline ring of the natural actinomycins X Oβ , X Oδ and X 2 (1c, 1d, 1b ) is situated in position 3' of the (β)-peptide chain. The new nonnatural variants iso-X Oβ (1e ) and Bis(hyp)-X 1 (1f) permitted interesting structure/activity studies. Furthermore, the amino acid sequence of the actinomycins X 2 (1b) and X 1a (1g) could be derived from NMR correlation spectra. A crystal structure analysis confirmed the complete structure of 1b (and thus that of 1c - e ) and showed the characteristical ,,A “-type conformation present in the depsipeptide rings. This corresponds to the solution conformation, which is clearly verified by typical NMR data.

June 2, 2014

Neighbouring Group Participation of C-6 Substituents of Glucose Derivatives on the Stereoselectivity of the N-Glycosidic Linkage of Glycopeptides

Hong Zhang, Yali Wang, René Thürmer, Khalid Parvez, Iqbal Choudhary, Atta-ur Rahman, Wolfgang Voelter

Page range: 692-698

Abstract

The first example of a glycopeptide with a direct N-α-glycosidic linkage between the trisaccharide and the amino acid residue was found in the glomerular basement membrane of rats. In connection with the total synthesis of nephritogenoside, glycosyl azides with different protecting groups and carbohydrate chain lengths are synthesized, reduced to the corresponding glycosyl amines and coupled with Z-Asp-OBzl. Remarkable differences in the α:β ratio of the condensation products are observed, caused by neighbouring group participation.

June 2, 2014

Synthese und Kristallstruktur von 3.6-Di-tert-butylpyridazin / Synthesis and Crystal Structure of 3.6-Di-tert-butylpyridazine

Norbert Kuhn, Heike Kotowski, Manfred Steimann

Page range: 699-700

Abstract

3,6-Di-tert-butylpyridazine (4) is obtained from 2,2,7,7-tetramethyloctan-3,6-dione (2) and anhydrous hydrazine in good yield. Its X-ray structure is reported.

June 2, 2014

p-Tolyl(trimethylsilylethynyl)sulfone as Synthon for the Synthesis of Cp(OC)₂M-C =CSiMe₃ (M ≡ Fe, Ru). Molecular Structure of Cp(OC)₂Fe-C ≡ CSiMe₃

Bernd Aechter, Kurt Polborn, Volker Weinrich, Wolfgang Beck

Page range: 701-704

Abstract

The alkynyl complexes Cp(OC) 2 M-C≡CSiMe 3 (M = Fe, Ru) are formed from p -tolylSO 2 C≡CSiMe 3 and [Cp(OC) 2 M] - Na + . The structure of Cp(OC) 2 Fe-C≡CSiMe 3 was determined by Xray diffraction.

About this journal

Objective
Zeitschrift fuer Naturforschung B (ZNB) publishes novel research in all areas of inorganic chemistry, organic chemistry, and analytical chemistry. In particular, the journal focuses on solid state chemistry, coordination chemistry, main group element chemistry, synthetic organic chemistry, natural product chemistry and, to a lesser extent, on analytical chemistry. For more than 65 years Zeitschrift fuer Naturforschung B has been open to contributions from all fields of experimental and theoretical chemistry. Zeitschrift fuer Naturforschung B publishes 12 issues per volume/year. Sometimes double issues occur.

Topics

Solid state chemistry
Coordination chemistry
Main group element chemistry
Organic chemistry
Natural product chemistry

Article formats
Original (full) papers, research notes and preliminary communications, reports on specific research topics of current interest (reviews)

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Volume 54 Issue 5

Issue of Zeitschrift für Naturforschung B

Chemische Reaktionen in Salzschmelzen, XXI. Titan-vermittelte Synthese von Silanen in Chloroaluminat-Schmelzen / Chemical Reactions in Molten Salts, XXI. Titanium Mediated Synthesis of Silanes in Chloroaluminate Melts

Abstract

Hydrolytische Bildung von Perchlorsiloxanen / Formation of Chlorosiloxanes by Hydrolysis

Abstract

Umsetzung von Cyclopentadienylmetallcarbonylen mit Thionylhalogeniden - Neue Synthese halogenoverbrückter Cp*Co-Komplexe / Reaction of Cyclopentadienyl Metal Carbonyles with Thionylhalides - New Synthesis of Halogeno-Bridged Cp*Co Complexes

Abstract

Abstract

S-, X-, Q- und W-Band-Pulver-EPR-Untersuchungen an Tetra-n -butylammonium-bis( 1,2-dicyanoethen-1,2-dithiolato)aurat(II), [(n-C4H9)4N]2[AuII(mnt)2] / S, X, Q and W Band Powder-EPR Investigations on Tetra-n-butylammoniumbis( 1,2-dicyanoethylene-1,2-dithiolato)aurate(II), [(n-C4H9)4N]2 [AuII(mnt)2]

Abstract

Unerwartete Reaktionsprodukte bei der Umsetzung von Mesitylmagnesiumbromid mit Arsentribromid / Unexpected Products from the Reaction of Mesitylmagnesium Bromide and Arsenic Tribromide

Abstract

1.3.5-Triazin-2,4,6-trisulfenyltrichlorid: Synthese, Eigenschaften und Reaktionsverhalten / 1.3.5-Triazine-2,4,6-trisulfenyltrichloride: Synthesis, Properties and Reactions

Abstract

Verdampfungsverhalten von Lanthantrihalogeniden / Evaporation Behaviour of Lanthanum Trihalides

Abstract

Synthese und Molekülstruktur des [α-(Dichlormethylsilyl)ethyl]- dichlorboran-dimethylsulfid / Synthesis and Molecular Structure of [α-(Dichloromethylsilyl)ethyl]- dichloroborane-dimethylsulfide

Abstract

Organogallitimamide: Synthese und Kristallstrukturen von [iPr2GaN(H)tBu]2 und [Mes(Cl)GaN(H)tBu]2 / Organogallium Amides: Synthesis and Crystal Structures of [iPr2GaN(H)tBu]2 und [Mes(Cl)GaN(H)tBu]2

Abstract

α-Dicarbonylmonoxime als Nucleophile und Nachbargruppen / α-Dicarbonylmonoximes as Nucleophiles and Neighbour Groups

Abstract

Abstract

A Short and Productive Synthesis of Racemic α-Lipoic Acid

Abstract

A Short and Productive Synthesis of (R)-α-Lipoic Acid

Abstract

5,10,15,20-Tetrakis(diphenylmethyl)porphyrin - A Nonplanar Porphyrin with Intermediate Degree of Ruffling

Abstract

Synthesis of 3-Amino(alkoxy)-2,4-dioxo-1,3-oxazolidine-5-carboxylates from Tartronic Esters

Abstract

Cyanothioacetamide and its Derivatives in Heterocyclic Synthesis: A New Route for the Synthesis of Several Pyridine and Thieno[2,3-b]pyridine Derivatives and their Biological Evaluation

Abstract

Synthese und Struktur von Prolinring-modifizierten Actinomycinen des X-Typs / Synthesis and Structure of Proline Ring Modified Actinomycins of the X-Type

Abstract

Neighbouring Group Participation of C-6 Substituents of Glucose Derivatives on the Stereoselectivity of the N-Glycosidic Linkage of Glycopeptides

Abstract

Synthese und Kristallstruktur von 3.6-Di-tert-butylpyridazin / Synthesis and Crystal Structure of 3.6-Di-tert-butylpyridazine

Abstract

p-Tolyl(trimethylsilylethynyl)sulfone as Synthon for the Synthesis of Cp(OC)2M-C =CSiMe3 (M ≡ Fe, Ru). Molecular Structure of Cp(OC)2Fe-C ≡ CSiMe3

Abstract

Umsetzung von Cyclopentadienylmetallcarbonylen mit Thionylhalogeniden - Neue Synthese halogenoverbrückter CpCo-Komplexe / Reaction of Cyclopentadienyl Metal Carbonyles with Thionylhalides - New Synthesis of Halogeno-Bridged CpCo Complexes

Organogallitimamide: Synthese und Kristallstrukturen von [ⁱPr₂GaN(H)^tBu]₂ und [Mes(Cl)GaN(H)^tBu]₂ / Organogallium Amides: Synthesis and Crystal Structures of [ⁱPr₂GaN(H)^tBu]₂ und [Mes(Cl)GaN(H)^tBu]₂

p-Tolyl(trimethylsilylethynyl)sulfone as Synthon for the Synthesis of Cp(OC)₂M-C =CSiMe₃ (M ≡ Fe, Ru). Molecular Structure of Cp(OC)₂Fe-C ≡ CSiMe₃