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  • 1
    Electronic Resource
    Electronic Resource
    Synthese, Strukturen und Eigenschaften der Cyclothiaselenazenium-Kationen [Se2N2S]22+, [XSe2N2S]+, [Se2N2S]2+, [S3SeN5]+ sowie Cl2Se2N2S und SeSN2 ṁ TiCl4 (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1895-1906 
    Details
    ISSN: 0009-2940
    Keywords: Selane, bis(sulfinylamido)- ; Diselane, trimethylsilyl- ; 1,3,4,2,5-Thiadiselenadiazolium ; 1,3,2,4-Thiaselenadiazete-Titanium tetrachloride ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis, Structures, and Properties of Cyclothiaselenazenium Cations [[Se2N2S]22+, [XSe2N2S]+, [Se2N2S]2+, [S3SeN5]+as well as Cl2Se2N2S and SeSN2 and SeSN2 ṁ TiCl4Bis(sulfinylamino)selane (1), prepared from Se2Cl2 and (CH3)3SiNSO, reacts with Lewis acids such as MF5 (M = As, Sb, Nb) and BF3 to form bis(1,3,4,2,5-thiadiselenadiazolium) cations (3) with counter anions AsF-6 (3a), SbF-6 (3b), NbF-6 (3c), BF-4 (3d). Treatment of Se2Cl2 with LiN[Si(CH3)3]2 leads to [(CH3)3Si]2NSexN[Si(CH3)3]2 (x = 1, 2a: 2, 2b). From 2a and 2a and SeCl4 explosive Se4N4 is obtained. Chlorination of 3a and 3c gives [ClSe2N2S]+[MF6]- (M = As, 4a, and Nb, 4c). Analogous bromination of 3a provides [BrSe2N2S]+ [AsF6]- (4b). This type of chlorinated five-membered rings is also obtained directly from 1 and SbCl5 and PCl5 or SeCl4. The products isolated are [ClSe2N2S]+ [SbCl6]- (4d) and [ClSe2N2S]+Cl- (4e). - A covalent species 5, isomeric to 4e, is obtained from 1 and POCl3, and a four-membered ring SeSN2 ṁ TiCl4 (6) from 1 and TiCl4. When 3a or 1 is treated with a two- or threefold excess of AsF5 the stable dication [Se2N2S]2+ (7) is formed. It arises also from 4e and AgAsF6. Attempts to replace TiCl4 in 6 by AsF5 lead to [SeS3N5]+ [AsF6]- (8) with a bicyclic structure for the cation. X-ray structure analyses for 1, 4c, 4d, 4e, 5, and 8 are performed.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240903
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  • 2
    Electronic Resource
    Electronic Resource
    (Bicyclo[3.2.0]hepta-1,3-dienyl)cobalt(I) Complexes (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 713-724 
    Details
    ISSN: 0009-2940
    Keywords: Bicyclo[3.2.0]hepta-1,3-dienyl complexes ; Calculations, semiempirical ; Alkyne trimerization ; Cobalt complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Three isomeric bicyclo[3.2.0]heptadienes 1 - 3 are compared by semiempirical calculations. Experimental attempts directed to the synthesis of derivatives of 1 are described. The synthesis, properties and some reactions of (η51-bicyclo[3.2.0]hepta-1,3-dienyl)(η41-cycloocta-1,5-diene)cobalt(I) (22), including an X-ray crystal structure determination of the reaction product with diphenylethyne, the tetraphenylcyclobutadiene complex 30, are presented.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260323
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  • 3
    Electronic Resource
    Electronic Resource
    [9,10-Dihydro-9,10-bis(trimethylsilyl)-9,10-anthrylen]magnesium; Molekülstruktur eines „Anthracenmagnesiums“ (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 4239-4247 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: [9,10-Dihydro-9,10-bis(trimethylsilyl)-9,10-anthrylene]magnesium - Molecular Structure of an „Anthracene Magnesium“The preparation and molecular structure of 9,10-bis(trimethylsilyl)anthracene (3) as well as of 5, the product of its reaction with metallic magnesium, are described. The magnesium atom in 5 forms an intramolecular bridge between the 9- and 10-positions of a 9,10-bis(trimethylsilyl)anthrylene system.
    Notes: Es werden die Darstellung und die Molekülstrukturen von 9,10-Bis(trimethylsilyl)anthracen (3) und dessen Reaktionsprodukt 5 mit Magnesiummetall beschrieben. In 5 überbrückt Magnesium intramolekular die 9,10-Positionen eines 9,10-Dihydro-9,10-bis(trimethylsilyl)-anthrylen-Systems.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851181030
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  • 4
    Electronic Resource
    Electronic Resource
    Cyclopentadienylsubstituierte Germylene und Stannylene als Komplexliganden (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 2789-2797 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyclopentadienyl-substituted Germylenes and Stannylenes as Complex LigandsTransition metal complexes of chloro(pentamethylcyclopentadienyl)germylene and -stannylene with pentacarbonylchromium and -tungsten bound to the 4B-element (3a, b, 5a, b) are available by alkylation of the ylide complexes Cl2(THF)El→M(CO)5 (El=Ge, Sn; M=Cr, W, 1a, b, 4a, b). X-Ray structure studies on the germylene complex Me5C5(Cl)-Ge→ W(CO)5 (3b) show that involving the lone-pair of the 4B-element in a metal-metal bond changes the distorted h5-Me5C5 coordination of the uncomplexed germylene to a highly symmetrical h2-structure.
    Notes: Übergangsmetallkomplexe des Chlor(pentamethylcyclopentadienyl)germylens und -stannylens mit am 4B-Element gebundener Pentacarbonylchrom- bzw. -wolframeinheit (3a, b, 5a, b) werden durch Alkylierung der Ylidkomplexe Cl2(THF)El→M(CO)5 (El=Ge,Sn; M=Cr, W, 1a, b, 4a, b) erhalten. Röntgenographische Untersuchungen am Germylenkomplex Me5C5(Cl)Ge→W(CO)5 (3b) zeigen, daß sich die Inanspruchnahme des “lone-pair” am 4B-Element in einem Wechsel der verzerrten h5-Me5C5-Koordination im freien Germylen zu einer hochsymmetrischen h2-Koordination äußert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851180720
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  • 5
    Electronic Resource
    Electronic Resource
    Neuartig chelatisierte Organodiboroxane und Organoboroxine aus Triorganoboroxinen und enolisierbaren 1,3-Diketonen (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 1931-1952 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Novel Chelated Organodiboroxanes and Organoboroxins from Triorganoboroxins and Enolizable 1,3-DiketonesTrialkylboroxins (RBO)3 (1) [1a: R=CH3; 1b: R=C2H5] react with enolizable 1,3-diketones (R′CO)2CH2 [2a: R′=CH3; 2b: R′=C6H5] at ≈ 20°C with fast degradation of the boroxin rings to give the monochelated diboroxanes 3 of the composition HOB(R)OB(R)OC(R′)CHC(R′)O [3aa: R=R′=CH3; 3ba: R=C2H5, R′=CH3; 3bb: R=C2H5, R′=C6H5] in yields up to 85%. The solid 3 with H-bridged bicyclic structures are in equilibrium with partially ring opened compounds in solution (1H, 11B, 13C, and 17O NMR data). From 1b with 2a or from triphenylboroxin (1c) with 2b the double chelated diboroxanes [RB(R′CO)2CH]2O [4ba: R=C2H5, R′=CH3; 4cb: R=R′=C6H5] are obtained. 1c reacts with 2a or 2b at 〉 140°C under slow protolysis of the B-phenyl residues to form the single and double chelated boroxins 5 and 6 having the compositions R2B3O3(R′CO)2CH [5ca: R=C6H5, R′=CH3; 5cb: R=R′=C6H5] and RB3O3[(R′CO)2CH]2 [6cb. R=R′=C6H5].  -  4, 5, and 6 with fully or partially chelated boron atoms are stable up to 〉 200°C.  -  The molecular structures of 4cb and 5ca were determined by X-ray analyses.
    Notes: Aus Trialkylboroxinen (RBO)3 (1) [1a: R=CH3; 1b: R=C2H5] bilden sich bei ≈ 20°C mit enolisierbaren 1,3-Diketonen (R′CO)2CH2 [2a: R′=CH3; 2b: R′=C6H5] unter raschem Abbau der Boroxin-Ringe in bis zu 85proz. Ausbeute die monochelatisierten Diboroxane 3 der Zusammensetzung HOB(R)OB(R)OC(R′)CHC(R′)O [3aa: R=R′=CH3; 3ba: R=C2H5, R′=CH3; 3bb: R=C2H5, R′=C6H5]. Die festen 3 mit H-verbrückter bicyclischer Struktur stehen in Lösung im Gleichgewicht mit partiell ringgeöffneten Verbindungen (1H-, 11B-, 13C- und 17O-NMR-Daten). Aus 1b erhält man mit 2a und aus Triphenylboroxin (1c) mit 2b die zweifach chelatisierten Diboroxane [RB(R′CO)2CH]2O [4ba: R=C2H5, R′=CH3; 4cb: R=R′=C6H5]. 1c reagiert mit 2a oder 2b bei 〉 140°C unter langsamer Protolyse der B-Phenylreste zu den einfach und zweifach chelatisierten Boroxinen 5 und 6 mit den Zusammensetzungen R2B3O3(R′CO)2CH [5ca: R=C6H5, R′=CH3; 5cb: R=R′=C6H5] und RB3O3[(R′CO)2CH]2 [6cb: R=R′=C6H5]. 4, 5 und 6 mit vollständig bzw. partiell chelatisierten Bor-Atomen sind bis 〉 200°C stabil.  -  Die Molekülstrukturen von 4cb und 5ca wurden durch Röntgenstrahlbeugungsanalysen bestimmt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861190615
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  • 6
    Electronic Resource
    Electronic Resource
    Thermal and photochemical reactions of naphtho[1,2,3,4-def]chrysene with 4-Phenyl-1,2,4-triazoline-3,5-dione (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1647-1650 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thermische und photochemische Reaktionen von Naphtho [1,2,34-def]chrysen mit 4-Phenyl-1,2,4-triazolin-3,5-dionDie thermischen und photochemischen Reaktionen von Naphtho [1,2,3,4-def]chrysen (1) mit 4-Phenyl-1,2,4-triazolin-3,5-dion (2) werden verglichen. In der thermischen Reaktion führt elektrophiler Angriff von 2 an 1 zum Substitutionsprodukt 4, welches z. T. zu 5 und 6 weiter umgesetzt wird. Unter Lichteinwirkung findet vorzugsweise [4π + 2π]-Cycloaddition von 2 an 1 unter nachfolgender Dehydrierung zu 6 statt; 6 wird durch das Licht zu einem komplexen Gemisch zersetzt, aus dem 10 isoliert werden kann. 5 existiert in zwei atropisomeren Formen. Die Struktur einer dieser Formen, 5b, wurde durch Kristallstrukturanalyse bestimmt.
    Notes: The thermal and photochemical reactions between naphtho-[1,2,3,4-def]chrysene (1) and 4-phenyl-1,2,4-triazoline-3,5-dione (2) have been compared. In the thermal reaction, 2 electrophilically attacks 1 to give substitution product 4 which in part is further transformed into 5 and 6. In the light-induced reaction, 2 predominantly undergoes [4π + 2π] cycloaddition to 1 with subsequent loss of hydrogen to yield 6 which then photodecomposes to give a complex mixture containing 10. 5 exists in two atropisomeric forms. The structure of one form, 5b, was determined by X-ray crystallography.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210917
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  • 7
    Electronic Resource
    Electronic Resource
    Neue Organobor-Sauerstoff-Halogenaluminium-Verbindungen aus Triorganoboroxinen mit Aluminiumtrihalogeniden (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 1301-1314 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Novel Organoboron-Oxygen-Halogenaluminium Compounds from Triorganoboroxins with Aluminium Trihalides4 mol of triorganoboroxins (RBO)3 (1) [R = CH3 (1a), C4H5 (1b), C4H9 (1c), C6H5 (1d)] react with 6 mol of aluminium trihalides AlHal3 (2) [Hal = Cl (2a), Br (2b)] under cleavage of 4 mol dihalogenoorganoboranes RBHal2 (3) [Hal = Cl: 3aa (R = CH3), 3ba (R = C2H5), 3ca (R = C4H9), 3da (R = C6H5); Hal = Br: 3bb (R = C2H5)] leading in high yields to 2 mol of compound 4 having the composition R4Al3B4Hal5O6 (MS analyses) [Hal = Cl: 4aa (R = CH3), 4ba (R = C2H5), 4ca (R = C4H9) 4da (R = C6H5); Hal = Br: 4bb (R = C2H5)]. The structure of 4aa, 4ba, 4ca, and 4bb in solution is deduced from spectroscopic data (IR; 1H-, 11B, 17O and 27Al NMR). The molecular structure of the solid (C6H5)4Al3B4Cl5O6 (4da) with two (AlOBOBO)-rings bonded through one penta-coordinated aluminium atom was determined by X-ray diffraction analysis.
    Notes: 4 mol Triorganoboroxin (RBO)3 (1) [R = CH3 (1a), C4H5 (1b), C4H9 (1c), C6H5 (1d)] reagieren mit 6 mol Aluminiumtrihalogenid AlHal3 (2) [Hal = Cl (2a), Br (2b)] unter Abspaltung von 4 mol Dihalogenorganoboran RBHal2 (3) [Hal = Cl: 3aa (R = CH3), 3ba (R = C2H5), 3ca (R = C4H9), 3da (R = C6H5); Hal = Br: 3bb (R = C2H5)] in hohen Ausbeuten zu 2 mol der neuen Verbindungen 4 mit der Zusammensetzung R4Al3B4Hal5O6 (MS-Analysen) [Hal = Cl: 4aa (R = CH3), 4ba (R = C2H5), 4ca (R = C4H9), 4da (R = C6H5); Hal = Br: 4bb (R = C2H5)]. Die Struktur von 4aa, 4ba, 4ca und 4bb in Lösung ermittelte man mit Hilfe spektroskopischer Daten (IR; 1H-, 11B-, 17O- und 27Al-NMR). Die Molekülstruktur des festen (C6H5)4Al3B4Cl5O6 (4da) mit zwei über ein fünffach koordiniertes Aluminium-Atom verknüpften (AlOBOBO)-Ringen wurde durch Röntgenstrahlbeugung bestimmt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861190419
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  • 8
    Electronic Resource
    Electronic Resource
    Pentacarbonylchrom-Komplexe von 1H-Isoindolen (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 1919-1930 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pentacarbonylchromium Complexes of 1H-IsoindolesThe 1H-isoindoles 1e-k are converted into the pentacarbonylchromium complexes 4e-k by means of ligand exchange reactions with pentacarbonyl(η2-cis-cyclooctene)chromium (3). Likewise, the 2H-isoindoles (2a-d) which are able to undergo tautomerism are complexed in the 1H-form 4a-d. This reaction allows, for the first time, to isolate even unsubstituted 1H-isoindole (1a) from the equilibrium with 2H-isoindole (2a) as a stable derivative 4a. The structure 4 of the pentacarbonyl(η1-1H-isoindole)chromium complexes is elucidated from the analytical and spectroscopic data (IR, 1H and 13C NMR, MS) as confirmed by means of an X-ray structure analysis of the 3-ethoxy-1H-isoindole complex 4e.
    Notes: Die 1H-Isoindole 1e-k werden durch Ligandenaustausch mit Pentacarbonyl(η2-cis-cycloocten)chrom (3) in die Pentacarbonylchrom-Komplexe 4e-k übergeführt; tautomeriefähige 2H-Isoindol (2a-d) werden ebenfalls in der 1H-Form komplexiert (4a-d). Diese Reaktion erlaubt erstmals, auch das unsubstituierte 1H-Isoindol (1a) aus dem Gleichgewicht mit 2H-Isoindol (2a) in Form eines stabilen Derivats 4a zu isolieren. Die Struktur 4 der Pentacarbonyl(η1-1H-isoindol)chrom-Komplexe ergibt sich aus den analytischen und spektroskopischen Daten (IR, 1H- und 13C-NMR, MS) und wird durch eine Röntgenstrukturanalyse des 3-Ethoxy-1H-isoindol-Komplexes 4e bestätigt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861190614
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  • 9
    Electronic Resource
    Electronic Resource
    Organische Synthesen mit Übergangsmetallkomplexen, 29. 2,3-Dihydroazet-Komplexe und 2-Azetidinone durch Templatsynthese mit Carbenkomplexen, Isocyaniden und Inaminen (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1475-1478 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organic Syntheses via Transition Metal Complexes, 291. - 2,3-Dihydroazete Complexes and 2-Azetidinones by Template Synthesis with Carbene Complexes, Isocyanides, and InaminesBy a three-component reaction of carbene complexes LnM = C(OEt)C6H5 [LnM = (CO)5Cr, (CO)5W] with isocyanides R1—-NC (R1 = CH3, c-C6H11) and the inamine Et2NC≡CCH3, an azetidinone 6 and a 2,3-dihydroazete (1-azetine) 5a or spiro-2,3-dihydroazete complex 5b are obtained resulting from an unusual cyclisation. 5a was characterised by an X-ray analysis.
    Notes: Durch Drei-Komponenten-Reaktion von Carbenkomplexen LnM = C(OEt)C6H5 [LnM = (CO)5Cr, (CO)5W] mit Isocyaniden R1—NC (R1 = CH3, c-C6H11) und dem Inamin Et2NC≡CCH3 erhält man ein Azetidinon 6 und als ungewöhnliches Cyclisierungsprodukt den 2,3-Dihydroazet-(1-Azetin-) 5a bzw. Spiro-2,3-dihydroazet-Komplex 5b. Verbindung 5a wurde kristallographisch charakterisiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210822
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  • 10
    Electronic Resource
    Electronic Resource
    Zur Lewis-Acidität von Nickel(0), X. Diorganylmagnesium-Komplexe von Nickel(0): (TMEDA)MgCH3(μ-CH3)Ni(C2H4)2 (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1921-1929 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Lewis Acidity of Nickel(0), X. - Diorganylmagnesium Complexes of Nickel(0): (TMEDA)MgCH3(μ-CH3(Ni(C2H4)2Tris(ethene)nickel(0) reacts with dialkylmagnesium solvate complexes (n-Donor)MgR2 (R = CH3, C2H5, n-C3H7, C2H4CH=CH2, C6H5; n-Donor = Et2O, THF, dioxan, TMEDA)4) below - 10°C to afford yellow crystalline, thermolabile compounds (n-Donor)MgR(μ-R)Ni(C2H4)2 (1-5). In addition, two equivalents of Ni(C2H4)3 react with (C4H8O2)Mg(C6H5)2 in ether to yield (Et2O)Mg(μ-C6H5)2{Ni(C2H4)2}2 (6), in which a central diphenylmagnesium molecule is bound to two bis(ethene)nickel(0) groups. An X-ray structure analysis shows that (TMEDA) MgCH3(μ-CH3)Ni(C2H4)2 (1c) contains an almost planar bis(ethen)nickel(0) unit coordinated by a dimethylmagnesium solvate complex by a Mg-μ-CH3-Ni multiple center bond with a Ni-Mg interaction. According to their 1H- and 13C-NMR spectra, the bridging and terminal organyl groups of 1-3 do not exchange in solution at 0°C. Apparently the monophenyl derivatives 5a, b and the dinuclear complex 6 are in equilibrium with each other.
    Notes: Tris(ethen)nickel(0) reagiert mit Dialkylmagnesium-Solvat-Komplexen (n-Donor)MgR2 (R = CH3, C2H5, n-C3H7, C2H4CH=CH2, C6H5; n-Donor = Et2O, THF, Dioxan, TMEDA)4) unterhalb - 10°C zu gelben kristallinen, thermolabilen Verbindungen (n-Donor)MgR(μ-R)Ni(C2H4)2 (1-5). Darüber hinaus entsteht aus zwei Äquivalenten Ni(C2H4)3 mit (C4H8O2)Mg(C6H5)2 in Ether (Et2O)Mg(μ-C6H5)2{Ni(C2H4)2}2 (6), in dem eine zentrale Diphenylmagnesium-Einheit zwei Bis(ethen)nickel(0)-Gruppen verbrückt. - Die Röntgen-Strukturanalyse ergab für (TMEDA)-MgCH3(μ-CH3)Ni(C2H4)2 (1c) eine annähernd planare Bis(ethen)-nickel-Einheit, an die ein Dimethylmagnesium-Solvat-Komplex über eine Mg-μ-CH3-Ni-Mehrzentrenbindung mit Ni-Mg-Wechselwirkung koordiniert ist. Laut 1H- und 13C-NMR-Spektren tauschen in Lösung bei 0°C die verbrückenden und endständigen Alkylgruppen von 1-3 nicht aus. Die phenylhaltigen Ein- und Zweikern-Komplexe (5a, b bzw. 6) stehen in Lösung offenbar miteinander im Gleichgewicht.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881211108
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