Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1970-1974  (30)
Source
Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie des Bors, LIII. Derivate von Silaborazolen (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 2234-2239 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Boron, LIII. Derivatives of SilaborazinesThe N, N′ - dilithiotriazaboradecalin 2 reacts with bis(dichloromethylsilyl)amine to form the disilaborazine derivative 3. No four membered cyclic BN2Si - system is produced from CH3B(NCH3Li)2 (4) and (C6H5)2SiCl2; however, the six membered silaborazines (C6H5)2Si[NCH3—BCH3]2NCH3 (8) and CH3B[NCH3—Si(C6H5)2]2NCH3 (7) are obtained besides [(C6H5)2SiNCH3]3 (6) and [CH3BNCH3]3 (9).
    Notes: Das N.N′ - Dilithio-triazaboradekalin 2 reagiert mit Bis (dichlormethylsilyl) - amin zum Disila - borazolderivat 3. Hingegen liefern Bis (N - lithio-methylamino) - methyl-boran (4) und Diphenyldichlorsilan kein viergliedriges BN2Si - Ringsystem, sondern neben [(C6H5)2SiNCH3]3 (6) und [CH3BNCH3]3 (9) die Silaborazole (C6H5)2Si[NCH3—BCH3]2NCH3 (8) und CH3B[NCH3—Si(C6H5)2]2NCH3 (7).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030727
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie des Bors, LIV. Chemische Eigenschaften von Tris(2.2-dimethyl-hydrazino)-boran (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 549-557 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Boron, LIV. Chemical Properties of Tris(2.2-dimethylhydrazino)boraneIn contrast to the ready cleavage of BN-bonds in tris(dialkylamino)boranes by BCl3, (BH3)2, HCl or CH3J the prefered reactions of these acids with tris(2.2-dimethylhydrazino)borane (1) are additions. Due to the greater basicity of the dimethylamino group as compared to the NH moiety, additions occur at the group (CH3)2N before the group NH is attacked. Solvolysis of B[NH—N(CH3)2]3 (1) by H2O or C2H5OH yields (CH3)2 N—NH2 and B(OH)3 or B(OC2H5)3, respectively, but no mixed compounds XnB[NH—N(CH3)2]3 n are formed in these reactions or by ligand exchange with B(OCH3)3 or B[N(CH3)2]3. 1 is stable up to 280° at higher temperature condensation with formation of N.N-dimethylhydrazine occurs.
    Notes: Während die Verbindungen BCl3, (BH3)2, HCl und CH3J die B N-Bindungen von Tris(dialkylamino)-boranen spalten, lagern sie sich an Tris(2.2-dimethyl-hydrazino)-boran (1) an. Dabei erfolgt zunächst Addition an die stärker basische Dimethylaminogruppe, danach reagiert auch die schwächer basische NH-Gruppe. Solvolysen von 1 mit H2O und C2H5OH oder Komproportionierungen mit B(OCH3)3 oder B[N(CH3)2]3 führen nicht zu gemischten Verbindungen XnB[NH—N(CH3)2]3 n(X—OH, OR, N(CH3)2). Im Vergleich zu Tris(alkylamino)-boranen ist 1 thermisch sehr stabil. Erst oberhalb 280° spaltet sich N,N-Dimethylhydrazin ab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711040225
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie des Bors, LVI. Derivate des Hydrazino-diphenylborans (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 722-733 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contribution to the Chemistry of Boron, LVI. Derivatives of HydrazinodiphenylboraneHydrazinodiphenylboranes of the type XNH—NH—B(C6H5)2 are monomeric (1a). The acyl derivatives (1b—d) (X = C6H5CO, CH3CO, (C6H5)2P(O)) are all internally coordinated through BO-bonds. -N.N′-Bis(diphenylboryl)derivatives of hydrazines (2a—c) are obtained from (C6H5)2BN(C2H5)2 and N2H4, CH3NH—NH2, or CH3NH—NHCH3 but no N.N′-bis-(diphenylboryl)hydrazines can be prepared by this method. Compounds of the latter type (3) are accessible via N-lithiohydrazines. - The structures of the new compounds are discussed and some of their chemical properties reported.
    Notes: Hydrazino-diphenylborane des Typs XNH—NH—B(C6H5)2 sind monomer (1a); in den N-Acyl-N′-diphenylboryl-hydrazinen (1b—d) (X = C6H5CO, CH3CO, (C6H5)2P(O)) liegt vierbindiges Bor vor. - N.N′-Bis-diphenylborylierung an Hydrazinen gelingt durch Einwirkung von (C6H5)2BN(C2H5)2 auf Hydrazin, Methylhydrazin und N.N′-Dimethyl-hydrazin (Bildung von 2a—c). Diese Umaminierung kann zur Darstellung von N.N′-Bis(diphenylboryl)-hydrazinen nicht herangezogen werden; sie (3) sind jedoch über mit LiCH3 metallierte Hydrazinderivate zugängig. - Die Strukturen der neuen Verbindungen werden diskutiert und einige ihrer chemischen Eigenschaften beschrieben.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711040309
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie des Bors, LIX. Notiz zur Darstellung des Tris(tert.-butyloxy)-borans und anderer tert.-Butyloxyborane (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 2423-2426 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050736
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie des Bors, LXII. N-Funktionelle Aminoborane : (Thiophosphorylamino)- und (Thiophosphinylamino)-diorganylboraneTeil der Staatsexamensarbeit D. Reiner, Univ. München 1972, und Teil der einzureichenden Dissertation W. Storch, Univ. München. (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 1508-1524 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Boron, LXII. N-Functional Substituted Aminohoranes : (Thiophosphorylamino)- and (Thiophosphinylamino)-diorgan ylboranesCompounds of the type R2P(S)—NR′—BR2″ (R=CH3, C6H5, (CH3)2N.—CH2(CH3N; R′ = CH3, C2H5, C6H5) are obtained a) by Si—N bond cleavage of R2P(S)—NR′—Si(CH3)3, b) by reaction of N-metallated thiophosphoryl- or thiophosphinylamines with diorganylboron halides, or c) by addition of sulfur to R2P—NR—BR2″. Si—N cleavage of silylamino-boranes by R2P(S)Cl predominantly yields borazines. As shown by n.m.r. investigations the barrier of rotation of the B—N bond decreased by introducing the R2P(S) group at the N atom of a monoaminoborane in accordance with the observed deshielding of the boron nucleus. This indicates a weakening at the B—N bond.
    Notes: Verbindungen des Typs R2P(S)—NR′—BR2″. (R=CH3, C6H5, (CH3)2N,—CH2(CH3)N; R′ = CH3, C2H5, C6H5) erhält man a) durch Silazanspaltung von R2P(S)—NR′—Si(CH3)3 und b) durch Umsetzung N-metallierter Thiophosphoryl- oder Thiophosphinylamine mit Diorganylborhalogeniden sowie c) durch Schwefeladdition an R2P—NR′—BR2″. Die Si—N-Spaltung von Silylaminoboranen durch R2P(S)Cl führt hingegen bevorzugt zu Borazinen. Wie die NMR-Spektren zeigen, senkt die Einführung der R2P(S)-Gruppe am N-Atom eines Aminoborans die Höhe der Rotationsbarriere um die B—N-Bindung in Übereinstimmnng mit dem beobachteten Abschirmungsverlust des B-Atoms. Dies zeigt eine Schwächung der B—N-Bindung an.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731060517
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie des Bors, LXVII. Silaborazine aus Cyclosilazanen (1974)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 3113-3120 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Boron, LXVII. Silaborazines from CyclosilazanesPhenyldichloroborane reacts with [(CH3)2SiNH]3 (5) to yield the disilaboranine 8, the monosilaborazine 7, and/or B,B′, B″-triphenylborazine (9), depending on the ratio of the reactants. Reaction with octamethylcyclotetrasilazane, [(CH3)2SiNH]4 (12), in a 1:1 molar ratio leads to NH4Cl, 8, and a polymer. Product analysis shows that only part of 8is formed by direct SiN-cleavage, the other part results from a substitution leading to NH4Cl.
    Notes: Phenylbordichlorid reagiert je nach Molverhältnis mit [(CH3)2SiNH]3 (5) zum Disilaborazin 8, Monosilaborazin 7und/oder B,B′, B″-Triphenylborazin (9). Bei der Umsetzung mit Octamethylcyclotetrasilazan, [(CH3)2SINH] 4 (12), im Molverhältnis 1:1 entstehen NH4Cl, 8 und Polymere. Aus der Stoffbilanz folgt, daß nur ein Teil von 8über direkte Silazanspaltung entstehen Kann; der andere ist die Folge einer zu NH4Cl führenden Substitutionsreaktion.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19741070932
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Tricarbonyl(diphenylborylbenzol)chrom(0) (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 2783-2785 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tricarhonyl(diphenylboryl benzene)chromium(0)Diphenylboron bromide reacts with bis[tricarbonyl(phenyl)chromio]mercury (1) to yield tricarbonyl(diphenylborylbenzene)chromium(0) (2), whose spectroscopic data indicate weaker π-bonding between the boron atom and the phenyl groups as compared to the free ligand.
    Notes: Diphenylborbromid reagiert mit Bis[tricarbonyl(phenyl)chromio]quecksilber (1) zu Tricarbonyl(diphenylborylbenzol)chrom(0) (2), dessen spektroskopische Daten auf eine geringere π-Wechselwirkung zwischen dem Boratom und den Phenylgruppen, verglichen mit dem freien Liganden, hinweisen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731060905
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Über ein bicyclisches Hydrazinodiphosphin und einige seiner Derivate (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 2637-2653 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On a Bicyclic Hydrazinodiphosphine and Some of its DerivativesThe nucleophilic character of the bicyclic hydrazinodiphosphine 1 is reduced as compared with P[N(CH3)2]3. Therefore only O, S and BH3 are added readily to the P atoms, Se and CH3J reluctantly and no reaction was achieved with Te. The n.m.r. and i.r. data are discussed. The fragmentation of the bicyclic compounds on electron impact results by preferential removal of CH3N and CH3N-NCH3 groups.
    Notes: Das bicyclische Hydrazinodiphosphin 1 zeigt im Vergleich zu P[N(CH3)2]3 geringere Nuclophilie. Daher konnte nur mehr O, S und BH3, erschwert Se und CH3J, nicht mehr jedoch Te an die P-Atome addiert werden. Die Kernresonanz- und IR-Daten werden diskutiert und die Massenspektren beschrieben. Die bevorzugte Fragmentierung der bicyclischen Verbindungen verläuft unter Austritt von CH3N- bzw. CH3N - NCH3-Gruppen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050826
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Kernresonanzspektroskopische Untersuchungen an Bor-Verbindungen, IV. 14N-Kernresonanzstudien an einfachen Amino-boranen (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 2883-2897 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: n.m.r. Investigations on Boron Compounds, IV. 14N-n.m.r. Studies on Simple Amino BoranesChemical shift data δ14N and line width at half peak height for a considerable number of amino boranes of the types B(NR2)3, B(NHR)3, R'B(NR2)2, R'B(NHR)2, R'2BNR2, R2'BNHR, R2BNH2, (R2'B)2NR, some hydrazino boranes and dialkylamino halogeno boranes are reported and discussed in connection with the δ11B data of these compounds. A decrease in shielding of the 14N nucleus is observed with increasing BN bond order. Neighbour anisotropy effects as exerted by the heavier halogens add to this trend in the shielding.
    Notes: Chemische Verschiebungen δ14N und Halbhöhenbreiten zahlreicher Amino-borane des Typs B(NR2)3, B(NHR)3, R'B(NR2)2, R'B(NHR)2, R'2BNR2, R2'BNHR, R2BNH2, (R2'B)2NR sowie einiger Hydrazinoborane und Dialkylamino-halogenborane werden mitgeteilt und im Zusammenhang mit δ11B-Werten vergleichend diskutiert. Es ergibt sich eine mit zunehmender BN-Bindungsordnung fallende Abschirmung des 14N-Kernes. Nachbargruppen-Anisotropie-effekte, insbesondere der schweren Halogene, verstärken diesen Trend.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050912
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie des Bors, LXIII. Darstellung von (Silylamino)- und (Stannylamino)boranen aus N-Lithioaminoboranen (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 1943-1951 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Boron, LXIII. Preparation of (Silylamino)- and (Stannylamino)boranes from N-LithioaminoboranesN-Methyl(silylamino)- and N-methyl(stannylamino)boranes are formed in the reaction of N-lithioaminoboranes with methylsilyl or methylstannyl chlorides Yields are satisfactory only when the metalation of the aminoboranes proceeds without side reactions.  -  (CH3)3Sn—NC2H5—B (CH3)2 iS thermally unstable In contrast to (CH3)3Sn—NCH3—B(C6H5)2. It decomposes primarily into B(CH3)3, (CH3B—NC2H5)3 and [(CH3)3Sn]2NC2H5. The silylation of aminoboranes leads to a stronger deshielding of the boron nucleus than Stannylation.
    Notes: N-Methyl(silylamino)- und N-Methyl(stannylamino)borane entstehen bei der Reaktion von N-Lithioaminoboranen mit Methylsilyl- bzw Methylstannylchloriden. Die Ausbeuten sind allerdings nur dann befriedigend, wenn die Metallierung der Aminoborane nicht von Nebenreaktionen begleitet wird.  -  (CH3)3Sn—NC2H5—B(CH3)2 ist im Gegensatz zu (CH3)3Sn—NCH3—B(C6H5)2 thermisch instabil und zerfällt bevorzugt in B(CH3)3, (CH3B—NC2H5)3 und [(CH3)Sn]2 NC2H5.  -  Die Silylierung der Aminoborane bewirkt einen stärkeren Abschirmungsverlust des Borkerns als die Stannylierung.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731060623
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...