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  • Wiley-Blackwell  (153)
  • Molecular Diversity Preservation International
  • 1985-1989  (153)
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  • 1
    Electronic Resource
    Electronic Resource
    A low-salt form of poly(dG-5M-dC) · poly(dG-5M-dC) (1985)
    New York : Wiley-Blackwell
    Biopolymers 24 (1985), S. 905-910 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360240513
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  • 2
    Electronic Resource
    Electronic Resource
    Binding of CC-1065 to poly- and oligonucleotides (1985)
    New York : Wiley-Blackwell
    Biopolymers 24 (1985), S. 1549-1572 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The binding of the antitumor agent CC-1065 to a variety of poly- and oligonucleotides was studied by electronic absorption, CD, and resistance to removal by Sephadex column chromatography. Competitive binding experiments between CC-1065 and netropsin were carried out with calf-thymus DNA, poly(dI-dC) · poly(dI-dC), poly(dI) · poly(dC), poly(rA) · poly(dT), poly(dA- dC) · poly(dG-dT), and poly(dA) · 2poly(dT). CC-1065 binds to polynucleotides by three mechanisms. In the first, CC-1065 binds only weakly, as judged by the induction of zero or very weak CD spectra and low resistance to extraction of drug from the polynucleotide by Sephadex chromatography. In the second and third mechanisms, CC-1065 binds strongly, as judged by the induction of two distinct, intense CD spectra and high resistance to extraction of drug from the polynucleotide, by Sephadex chromatography in both cases. The species bound by the second mechanism converts to that bound by the third mechanism with varying kinetics, which depend both on the base-pair sequence and composition of the polynucleotide. Competitive binding experiments with netropsin show that CC-1065 binds strongly in the minor groove of DNA by the second and third mechanisms of binding. Netropsin can displace CC-1065 that is bound by the second mechanism but not that bound by the third mechanism. CC-1065 binds preferentially to B-form duplex DNA and weakly (by the first binding mechanism) or not at all to RNA, DNA, and RNA-DNA polynucleotides which adopt the A-form conformation or to single-strand DNA. This correlation of strong binding of CC-1065 to B-form duplex DNA is consistent with x-ray data, which suggest an anomalous structure for poly(dI) · poly(rC), as compared with poly(rI) · poly(dC) (A-form) and poly(dI) · poly(dC) (B-form). The binding data indicate that poly(rA) · poly(dU) takes the B-form secondary structure like poly(rA) · poly(dT). Triple-stranded poly(dA) · 2poly(dT) and poly(dA) · 2poly(dU), which are considered to adopt the A-form conformation, bind CC-1065 strongly. Netropsin, which also shows a binding preference for B-form polynucleotides, also binds to poly(dA) · 2poly(dT) and occupies the same binding site as CC-1065. These binding studies are consistent with results of x-ray studies, which suggest that A-form triplex DNA retains some structural features of B-form DNA that are not present in A-form duplex DNA; i.e., the axial rise per nucleotide and the base tilt. Triple-stranded poly(dA) · 2poly(rU) does not bind CC-1065 strongly but has nearly the same conformation as poly(dA) · 2poly(dT) based on x-ray analysis. This suggests that the 2′-OH group of the poly(rU) strands interferes with CC-1065 binding to this polynucleotide. The same type of interference may occur for other RNA and DNA-RNA polynucleotides that bind CC-1065 weakly.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360240811
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Lewis-Acidität von Nickel(0), I. Methyllithium-Komplexe von Nickel(0) (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 275-297 
    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), I. Methyllithium Complexes of Nickel(0)The synthesis and properties of the methyllithium complexes of nickel(0) of the type (n-Donor)m-(LiCH3)Ni0(π-Ligand)n (1a-c, 16a-c, 20a-c) [n-Donor = chelating amine or THF; π-Ligand = CDT, ethene, or CO] are described. The structure of (PMDTA)(LiCH3)Ni(C2H4)2 (1b) has been determined by X-ray crystallography.  -  In these ate complexes, a carbanionic methyl group is σ-bonded to a nickel atom, the acceptor strength of which depend on the π-ligands. The chemical and spectroscopic properties indicate that the Ni—CH3 bond in the carbonyl complex is largely covalent whereas in the CDT and ethene compounds it is more polar. The CDT complex is thermolabile in solution. The findings are in agreement with the following series of increasing acceptor strength: Ni(CDT) 〈 Ni(C2H4)2 〈 Ni(CO)3.
    Notes: Es wird über die Synthese und Eigenschaften der Methyllithium-Komplexe von Nickel(0) (n-Donor)m(LiCH3)Ni0(π-Ligand)n Wir bezeichnen mitπ-Liganden solche Liganden, die als π-Akzeptoren mit einem Übergangsmetallatom dπ—pπ—oder dπ—dπ-Rückbindungen auszubilden vermögen (Alkene, CO, auch Phosphane);n-Donoren solche Liganden, die als „harte Basen“ (Ether, Amine) über ihre freien Elektronenpaare vornehmlich Hauptgruppenmetall-Ionen, d.h. „harte Säuren“ komplexieren;σ-Donoren solche Liganden, die  -  ohne über Akzeptororbitale zu verfügen  -  entweder polare Bindungen enthalten und Mehrzentrenbindungen eingehen können (Metallalkyle und -hydride) oder ein freies Elektronenpaar bereitstellen (Carbanionen, Phosphorane, Hydrid-Ion), wobei σ-Bindungen zu einem niederwertigen Übergangsmetallatom ausgebildet werden. (1a-c, 16a-c, 20a-c) mit Chelataminen oder THF als n-Donoren und CDTAbkürzungen: CDT = trans,trans,trans-l,5,9-Cyclooctadien; COT = Cyclooctatetraen; PMDTA = Pentamethyldiethylentriamin; TMEDA = Tetramethylethylendiamin; MA+A = Alkalimetall- bzw. quartäres Ammonium-Kation., Ethen oder CO als π-Liganden berichtet. Die Struktur von (PMDTA)(LiCH3)Ni(C2H4)2 (1b) wurde röntgenographisch bestimmt.  -  In diesen at-Komplexen ist eine carbanionische Methylgruppe über eine σ-Bindung an ein Nickelatom gebunden, dessen Akzeptorstärke von den π-Liganden abhängt. Chemische und spektroskopische Eigenschaften der Komplexe lassen für CDT oder Ethen als π-Liganden auf vergleichsweise polare, für den CDT-Komplex in Lösung dazu thermolabile Ni—CH3-Bindungen schließen, während für den Carbonyl-Komplex aufgrund von 13C-NMR-Daten eine überwiegend kovalente Ni—CH3-Bindung anzunehmen ist. Die Befunde stehen mit folgender Reihe zunehmender Akzeptorstärke im Einklang: Ni(CDT) 〈 Ni(C2H4)2 〈 Ni(CO)3.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851180126
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  • 4
    Electronic Resource
    Electronic Resource
    Organische Synthesen mit Übergangsmetallkomplexen, 231) Bicyclische 3-Imidazoline aus primären Isocyaniden und Alkenylcarben-Komplexen durch metallinduzierte anomale Insertion einer C=N- in eine α-CH-Bindung des Isocyanids (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 1287-1291 
    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, 231). - Bicyclic 3-Imidazolines from Primary Isocyanides and Alkenylcarbene Complexes by a Metal-Induced Anomalous Insertion of a C=N- into an α-CH Bond of the IsocyanideAlkenylcarbene complexes 1 react smoothly with one equivalent of methyl- and primary isocyanides 2 to give 1:1 adducts 3, which contain C-alkenyl ketenimine ligands. To these a second molecule of 2 may be added in a [4 + 1] fashion with formation of bis-(imino)cyclopentene complexes 6 or - in a competing reaction path - with induction of a second spontaneous ring closure to 3-imidazoline complexes 4/5 by an insertion of 2 into the α-CH bond of 3. Complexes 4-6 were characterized spectroscopically, the 3-imidazoline complex 4a also by an X-ray analysis. In competition with the addition of 2c to 3c an isomerisation of 3c to the α-alkoxycyanide complex 9a is observed involving an N/Cmigration of the N-allyl group. Steric factors exhibit strong influences on the course of the different competition reactions.
    Notes: Alkenylcarben-Komplexe 1 bilden mit Methyl- bzw. einem primären Isocyanid 2 1:1-Addukte 3, die einen C-Alkenylketenimin-Ligand enthalten. An diesen läßt sich ein zweites Molekül 2 addieren unter [4 + 1]-Cycloaddition zu Bis(imino)cyclopenten- 6 bzw. unter weiterem Ringschluß zu 3-Imidazolin-Komplexen 4/5 durch metallinduzierte Insertion von 2 in eine α-CH2N-Bindung von 3. Die Komplexe 4-6 wurden spektroskopisch, der 3-Imidazolin-Komplex 4a zusätzlich durch eine Kristallstrukturanalyse charakterisiert. Neben einer Addition von 2c an 3c wird eine Isomerisierung von 3c zum α-Alkoxycyanid-Komplex 9a unter N/C-Wanderung des N-Allylrests beobachtet. Sterische Faktoren beeinflussen entscheidend das Zusammenspiel sämtlicher Konkurrenzreaktionen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871200804
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  • 5
    Electronic Resource
    Electronic Resource
    Bildung diastereomerer Zirconiooxycarbenkomplexe durch Umsetzung von Bis(tert-butyl-Cp)2Zr(butadien) mit Hexacarbonylowolfram (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1069-1074 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Formation fo Diastereomeric Zireconiooxycarbene Complexes by Treating of Bis (tert-butyl-Cp)2Zr(butadiene) with hexacarbonyltungstenReaction of (η4-butadiene)bis(η-tert-butylcyclopentadienyl)zirconium (95:5 s-cis-/s-trans-5 equilibrium mixture) with hexacarbonyltungsten yields the zirconiooxycarbene complex (6), that crystallizes in space group P1 (X-ray analysis). The chiral central metallacyclic ring system and the chiral preferred conformation of the Cp-substituted bent metallocene unit leads to the formation of diastereomeric zirconiooxycarbene complexes 6 and 6′. X-ray structural analysis as well as the 13C CP/MAS spectrum indicate the presence of an 80:20 mixture of the two diastereomeric carbene complexes in the solid state. The existence of equilibrating diastereomers in solution was derived from the temperature dependent NMR spectra of the dissolved carbene complex.
    Notes: Die Reaktion von (η4-Butadien)bis(η-tert-butylcyclopentadienyl)-zirconium (95:5-s-cis-/s-trans-5-Gleichgewichtsgemisch) mit Hexacarbonylwolfram liefert den Zirconiooxycarbencomplex (6), der in der Raumgruppe P1 kristallisiert (Röntgenstrukturanalyse). Aufgrund des chiralen zentralen metallacyclischen Ringsystems und der chiralen Vorzugskonformation des Cp-substituierten gewinkelten Metallocensystems werden diastereoisomere Zirconiooxycarbenkomplexen 6 und 6′ gebildet. Röntgenstrukturanalyse und 13C-CP/MAS-Spektrum deuten auf das Vorliegen eines 80:20-Gemisches dieser diastereomeren Carbenkomplexe im Festkörper hin. Die temperaturabhängigen NMR-Spektren des Carbenkomplexes in Lösung werden mit einem Gleichgewicht der Diastereomeren interpretiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210609
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  • 6
    Electronic Resource
    Electronic Resource
    Synthese eines heteroatomstabilisierten Rhodiumcarbenkomplexes durch Reaktion von CpRh(CO)2 mit (Butadien)zirconocen (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 1763-1765 
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    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of a Heteroatom-Stabilized Rhodiumcarbene Complex by Reaction of CpRh(CO)2 with (Butadiene)zirconocene(η4-Butadiene)zirconocene reacts at room temperature in toluene with CpRh(CO)2 to give the metallacyclic [(π-allyl)zirconoxy]rhodium carbene complex Cp2Zr(C4H6)(OC=)Rh(CO)Cp 5. The structure of 5 was determined by X-ray analysis. The Rh-carbene unit Cp(CO)Rh=C(R)OM is almost planar, featuring the —O[Zr] and Cp groups in a Z orientation at the Rh=C moiety [dRh—C(carbene) = 1.925(3) Å].
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871201024
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  • 7
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    Photochromie einfacher 1,8a-Dihydroindolizine bzw. 1,8a-Dihydro-5-azaindolizine (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 843-851 
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    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Photochromism of Simple 1,8a-Dihydroindolizines and 1,8a-Dihydro-5-azaindolizinesIn this paper we report on the synthesis of new photochromic 1,8a-dihydroindolizines and 1,8a-dihydro-5-azaindolizines 19 and betaines 18 as well as their precursors 3,3-diphenyl-3H-pyrazoles 13 and cyclopropenes 15. The structures of the betaines 18 are proved for the first time by X-ray analysis of 181. The last part of this paper deals with Hammett correlations of the rate constant of the 1,5-electrocyclisation and MINDO/3 calculations of the thermal ring closure 18→19.
    Notes: In dieser Arbeit berichten wir über die Synthese neuer photochromer 1,8a-Dihydroindolizine (DHI) bzw. 1,8a-Dihydro-5-azaindolizine 19 und Betaine 18 sowie über die Darstellung der als Vorstufen benötigten 3,3-Diaryl-3H-pyrazole 13 bzw. der Cyclopropene 15. Die Struktur der Betaine 18 wird durch die Kristallstrukturanalyse von 181 erstmals eindeutig gesichert. Im letzten Teil wird eine Struktur-Reaktivitäts-Beziehung der UV-spektroskopisch bestimmten Cyclisierungsgeschwindigkeiten mit Hammett-Parametern vorgenommen und Studien zum Mechanismus des thermischen Ringschlusses 18→19 durch MINDO/3-Rechnungen an einem Modellsystem beschrieben.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881210506
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  • 8
    Electronic Resource
    Electronic Resource
    Insertion koordinierten Olefins in die Organyl-Metall-Bindung bei CpNi(organyl)(η2-olefin)-Komplexen (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1931-1940 
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    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Insertion of Coordinated Olefins into the Organyl-Metal Bond of CpNi(organyl)(η2-olefin) ComplexesThe CpNiR(η2-CH2=CH2) complexes 1-13 react with insertion of the coordinated ethylene into the Ni—R bond. In the cases where R = Ph (5) and p-C6H4X [X = Me (6), CMe3 (7), SiMe3 (8), OMe (9), F (11), Cl (12), Br (13)], the primary reaction products D can be trapped at -50 to -10°C by complexation to ethylene, to give, e.g., CpNi(p-CH2CH2C6H4X)(η2-CH2=CH2), 22 and 23, or to [D4]ethylene to give 24. Rearrangement to the (1,2,7-η3-benzyl)NiCp complexes 14-21 occurs in the absence of excess ethylene. The rate of insertion of the complexed ethylene increases (relative to the CpNiPh compound 5) in the presence of donor substituents in the p-Ph position and decreases in the presence of acceptor groups. The complexes Cp*Ni(p-C6H4X)(η2-CH2=CH2) 25-27 are less reactive; they require temperatures ca. 30°C higher than their Cp analogues to form the ethylene complexes of their insertion products. The η2-butadiene compounds CpNiR(1-2-η2-CH2=CHCH=CH2) [R = Ph (31), p-p-C6H4Me (32), p-C6H4CMe3 (33)] react above -60°C with insertion of the coordinated C=C bond to give the anti-(1-benzyl-η3-allyl)NiCp compounds 35b-37b, and these rearrange at 60°C to the thermodynamically more stable syn isomeres a. The reactivity of the Cp(organyl)Ni(η2-olefin) complexes with respect to olefin insertion into the organyl-Ni bond decreases in the order: CpNi-(p-C6H4X)(butadiene) 〉 CpNi(p-C6H4X)(C2H4) 〉 Cp*Ni(p-C6H4X)(C2H4) 〉 CpNi(alkyl)(C2H4) (alkyl = Me, Et 〉 Pr, Bu).
    Notes: CpNiR(η2-CH2=CH2)-Komplexe 1-13 reagieren mit Insertion des koordinierten Ethylens in die R—Ni-Bindung. Bei R = Ph (5) und p-C6H4X [X = Me (6), CMe3 (7), SiMe3 (8), OMe (9), F (11), Cl (12), Br (13)] lassen sich zwischen -50 und -10°C die primären Reaktionsprodukte D durch Komplexierung an Ethylen z.B. als CpNi(p-CH2CH2C6H4X)(η2-CH2=CH2), 22 bzw. 23, oder mit [D4]Ethylen als 24 abfangen. Bei Abwesenheit überschüssigen Ethylens lagern sie sich in die (1,2,7-η3-Benzyl)NiCp-Komplexe 14-21 um. Verglichen mit der CpNiPh-Verbindung 5 beschleunigen Donorsubstituenten und verzögern Akzeptorgruppen in p-Ph-Stellung die Insertion komplexierten Ethylens. Entsprechende Cp*Ni(p-C6H4X)(η2-CH2=CH2)-Komplexe 25-27 sind weniger reaktiv und bilden erst bei um ca. 30°C höherer Temp. mit überschüssigem Ethylen die Ethylen-Komplexe der Insertionsprodukte. Aus den η2-Butadien-Verbindungen CpNiR(1-2-η2-CH2=CHCH=CH2) [R = Ph (31), p-C6H4Me (32), p-C6H4CMe3 (33)] werden bereits oberhalb - 60°C durch Insertion der koordinierten C=C-bindung die anti-(1-Benzyl-η3-allyl)NiCp-Komplexe 35b-37b erhalten, die sich bei 60°C in die thermodynamisch stabileren syn-Isomeren a umlagern. Die Reaktionsfähigkeit der Cp(organyl)Ni(η2-olefin)-Komplexe zur Olefin-Insertion in die Organyl-Ni-Bindung sinkt in der Reihe: Cp-Ni-(p-C6H4X)(butadien) 〉 CpNi(p-C6H4X)(C2H4) 〉 Cp*Ni(p-C6H4X)(C2H4) 〉 CpNi(alkyl)(C2H4) (alkyl = Me, Et 〉 Pr, Bu).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881211109
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  • 9
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    (Trifluormethyl)germane, III. Darstellung neuer (Trifluormethyl)germanium-Chalkogen-Verbindungen (1989)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 122 (1989), S. 271-277 
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    ISSN: 0009-2940
    Keywords: Chalcogenogermanes, (trifluoromethyl)- ; Disilaselenanes ; Germachalcogenanes, bis(trifluoromethyl)- ; Germanes, (trifluoromethyl)- ; Germatranes, (trifluoromethyl)- ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: (Trifluormethyl)germanes, III. - Preparation of New (Trifluormethyl)germanium Chalcogene CompoundsStarting with the dihalogenobis(trifluoromethyl)germanes (CF3)2-GeX2 (X = Cl, or I), halogen-chalcogen exchange leads to corresponding chalcogen derivatives of the general type [(CF3)2GeE]n (6, 7) (E = O, NH, S, or Se). The resulting compounds differ in their degree of polymerisation. [(CF3)2GeO]x and the corresponding sesquioxane [(CF3)GeO1, 5]x are highly polymeric, quite in contrast to the corresponding germathianes and -selenanes. The crystal structure of [(CF3)2GeO]x (6a) was determined by X-ray single crystal diffraction. The reaction of CF3GeCl3 with triethanolamine results in the formation of 1-(trifluoromethyl)germatrane (13). Disilaselenane (10) reacts at low temperatures with chloro-(trifluoromethyl)germanes (CF3)nGeCl4-n under retention of one Si—Se bond to give (CF3)nGe(SeSiH3)4-n (11) and H3SiCl. Compounds with n = 3 and 2 could be isolated. Exchange of iodine by ECF3 takes place with iodogermanes (CF3)nGeI4-n and Hg(ECF3)2 (E = S, Se) with formation of a complete series of (trifluoromethyl)(trifluoromethylchalcogeno)germanes (CF3)nGe-(ECF3)4-n (3, 5).
    Notes: Durch Halogen-Chalkogen-Austauschreaktionen an (CF3)2)GeX2 (X = Cl, I) wurden Bis(trifluormethyl)germachalkogenane [(CF3)2GeE]n (6, 7) E = O, NH, S, Se) von unterschiedlichem Oligomerisierungsgrad erhalten. Die Germoxane [(CF3)2GeO]x und (CF3GeO1,5)x sind im Gegensatz zu den homologen Germathianen und -selenanen polymer, wobei die Struktur von [(CF3)2GeO]x (6a) durch eine Kristallstrukturanalyse ermittelt wurde. Durch Umsetzung von CF3GeCl3 mit Triethanolamin wird 1-(Trifluormethyl)germatran (13) erhalten. Disilaselenan (10) reagiert bei tiefen Temperaturen mit den Chlor (trifluormethyl)-germanen (CF3)nGeCl4-n monofunktionell unter Erhalt einer Si—Se-Bindung zu (CF3)nGe(SeSiH3)4-n (11) und H3SiCl, von denen die Verbindungen mit n = 3 und 2 isoliert werden konnten. Reaktionen der Iodgermane (CF3)nGeI4-n(1) mit Hg(ECF3)2) (E = S, Se) führen unter Substitution des Iods gegen die ECF3-Gruppen zur vollständigen Reihe der (Trifluormethyl)(trifluormethylchalkogeno)germane (CF3)nGe(ECF3)4-n (3, 5).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19891220210
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  • 10
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    [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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