Go toArchive
Browse byFacets
Bookbag ( 0 )
'Boron Compounds' in keywords
Results  3 Items
Sorted by   
Section
Publication Year
1982 (1)
1978 (1)
1976 (1)
1Author    C. E. May, K. Niedenzu, S. TrofimenkoRequires cookie*
 Title    Spectroscopic Studies on Pyrazaboles  
 Abstract    The mass spectra of several pyrazaboles of type 1 where R and'or R' = C2H5 have been studied. The loss of boron-bonded hydrocarbon moieties under electron impact is the predominant feature of all spectra. Some ultraviolet and nuclear magnetic resonance data on compounds of type 1 have been collected; bulky substituents were observed to lead to conformational isomers that can be detected by 13 C NMR spectroscopy. 
  Reference    Z. Naturforsch. 33b, 220—223 (1978); received October 11 1977 
  Published    1978 
  Keywords    Pyrazaboles, Dimeric Aminoboranes, Boron Compounds, Mass Spectra, NMR 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0220.pdf 
 Identifier    ZNB-1978-33b-0220 
 Volume    33 
2Author    S. TrofimenkoRequires cookie*
 Title      
 Abstract    The mass spectra of several pyrazaboles of type 1 (R = H) have been studied. The data illustrate that electron impact causes three major fragmentation patterns for the species. Symmetrical cleavage of the pyrazabole followed by further breakdown is common to all compounds. In addition, those pyrazaboles containing H or CH3 at the C atoms of the pyrazole rings undergo an electron impact-induced rearrangement which appears to result in the formation of a species containing a B2N3 ring as a structural entity; subsequent breakdown leads to a B2N2 ring system. The mass spectra of halo-or pseudohalo-substi-tuted pyrazaboles evidence the ready loss of hydrogen halide as a predominant feature; no rearrangement ions are observed. 
  Reference    (Z. Naturforsch. 31b, 1662—1666 [1976]; received September 16 1976) 
  Published    1976 
  Keywords    Pyrazaboles, 1-Pyrazolylboranes, Dimeric Aminoboranes, Mass Spectra, Boron Compounds 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-1662.pdf 
 Identifier    ZNB-1976-31b-1662 
 Volume    31 
3Author    Eberhard Bessler, Johann WeidleinRequires cookie*
 Title    Borkomplexe mit Dicarbonsäuren: Bis(oxalato)borate und Bis(malonato)borate Boron Complexes with Dicarboxylic Acids: Bis(oxalato)borates and Bis(malonato)borates  
 Abstract    Several bis(oxalato)borates and bis(malonato)borates have been prepared in hetero-geneous reaction from boric acid, dicarboxylic acid and dicarboxylic salt by refluxing in benzene under continuous separation of water. The compounds were characterized by their IR and n B NMR spectra. The vibrational spectra of the bis(oxalato)borate are discussed in detail. 
  Reference    Z. Naturforsch. 37b, 1020—1025 (1982); eingegangen am 18. Februar 1982 
  Published    1982 
  Keywords    Boron Compounds, Dicarboxylic Acids, Bis(oxalato)borates, Bis(malonato)borates, Vibrational Spectra 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1020.pdf 
 Identifier    ZNB-1982-37b-1020 
 Volume    37