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  • 1995-1999  (2)
  • (Hydroboryl)(methoxyboryl)amine  (1)
  • 10-Organo-10-aza-nido-nonaborates  (1)
  • 1,2,5,6,3,4,7,8-Tetraazatetraborocane
  • 1
    Electronic Resource
    Electronic Resource
    Protolysis of Tri-tert-butylazadiboriridine: Formation of a B-H-B Bridge in Unusual Coordination (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 99-103 
    Details
    ISSN: 0009-2940
    Keywords: Tri-tert-butylazadiboriridine ; (Hydroboryl)(methoxyboryl)amine ; 2,3-μ-Hydro-1,2,3-azoniadiborata-l-cyclopropenes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The B—B bond of tri-tert-butylazadiboriridine [—NR—BR—BR—] (R = tBu; 1) is oxidized by MeOH to give the (hydroboryl)(methoxyboryl)amine H—BR=NR-BR(OMe) (2a). μ-2,3-Hydroazoniadiborata-1-cyclopropenes [=NR—BR(X)—μH—BR=] (3a, 3c-e) are formed by the action of the acids HX upon 1. A similar hydrogen bridge as in 3a-e is formed during the hydroboration of 1 by catecholborane, yielding 3f. A B atom is identified in the products 3a-f to be planarly coordinated by four atoms, two of which are forming a BHB three-center bond with that B atom. This is a novel bonding situation in boron chemistry. The structures of the products are deduced from 1H-, 11B-, and 13C-NMR spectra and are confirmed by X-ray structural analyses of 2a, 3a, and 3c.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280203
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Auf- und Abbau von Azadecaboranen; Aza-nido-nonaboratFrau Professor Marianne Baudler zum 75. Geburtstag gewidmet. (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 1221-1224 
    Details
    ISSN: 0009-2940
    Keywords: 10-Organo-10-aza-nido-nonaborates ; 6-Alkylamine-4-aryl-4-aza-arachno-nonaboranes ; 1-Orgaro-1-aza-closo-decaboranes ; 6-Aryl-6-aza-nido-decaboranes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and Degradation of Azadecaboranes; Aza-nido-nonaborateThe boranes arachno-B9H13(NRH2 (1a-c: R = p-ClC6H4, p-MeC6H4, PhCH2) are dehydrogenated at 140°C to give nido-RNB9H11 (2a-c), from which the azaboranes closo-RNB9H9 (3a-c) are formed on further dehydrogenation at 460°C. These azaboranes are deboronated either by the attack of the amine iPrNH2 or by one of the fluorides [NBu4]F or [S(NMe2)3][Me3SiF2] in THF. One of the four boron atoms adjacent to nitrogen in the closo species is removed and then detected in the borazine (HNBiPr)3 or the borate BF4, respectively, whereas the novel anions nido-RNB8H9 (4a-c) remain. The structure of 4a-c corresponds to that of nido-SB8-H9-, according to NMR spectra. Primary amines R'NH2 deboronate the closo-boranes 3a, b in a solvent less polar than THF to give the amine - azanonaboranes arachno-RNB8H10-(NR'H2) (5a-c: R' = iPr, Pr, Bu). The nido product [iPrNH3][(p-ClC6H4)NB8H9 is converted into a mixture of the arachno products 5a and (p-ClC6H4)NB8H10(NPrH2) (5d) by the action of PrNH2, making plausible that anions of type 4 are intermediates during the transformation of 3 into 5.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951281213
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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