981-87-3Relevant academic research and scientific papers
BORAZENE DERIVATIVES
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Page/Page column 38, (2012/10/08)
The present invention is directed to new borazene derivatives and their use in the manufacture of electronic devices, in particular electroluminescent and semiconductor devices. More specifically, the present invention relates to new stable borazene derivatives comprising boron atoms substituted by aryl groups and to their use in one or more layers of an electroluminescent or a semiconductor device, in particular in the emissive layer of organic light-emitting devices (OLED).
1H and 13C NMR studies of η6-benzo-bonded (boron-nitrogen heteroarene)tricarbonylchromium complexes and related η6-phenyl-bonded (B, B', B''-trimethyl-N, N', N''-triarylborazine)-tricarbonylchromium complexes: crystallographic structure of a boron-nitrogen heteroarene
Allaoud, Smaiel,Conte, Seny,Fenet, Bernard,Frange, Bernard,Robert, Francis,et al.
, p. 59 - 68 (2007/10/02)
2,4-dimethyl-3-phenyl--7-chloro-8-methyl-2,4-dibora-1,3-diazaronaphthalene (C16H18B2N2Cl2) crystallizes in the monoclinic system: P2/a; a=8.149(3) Angstroem, b=13.379(3) Angstroem and c=15.193(3) Angstroem; β=91.03(2)o; Z=4; R=0.043; Rw=0.041.Reaction with gives exclusively the compounds with Cr(CO)3 η6-bonded to the benzo part of the molecule.This derivative is a 1:1 mixture of atropisomers which were partially separated and whose configurations could be deduced by means of solvent effects in nuclear magnetic resonance (NMR) spectroscopy.Similar results were obtained with 2,4-dimethyl-3-phenyl--6-chloro-8-methyl-2,4-dibora-1,3-diazaronaphthalene and although the separation of isomers failed.Additionally, two closely related η6-bonded isomers originating from the above ligands were identified in which the chlorine atom was replaced by a hydrogen atom.All these compounds were thoroughly characterized by high resolution 1H and 13C one-dimensional and 1H-1H nuclear Overhauser spectroscopy (NOESY) and correlated two-dimensional NMR spectroscopy (COSY).Further, the reaction of with B,B',B''-trimethyl-N,N',N''-triarylborazine, the phenyl bearing a para substituent (H, F or Me), was shown by 1H and 13C NMR spectroscopy to yield a compound with one phenyl group η6 bonded to Cr(CO)3.Key words: Chromium; Boron; Nuclear magnetic resonance
HETEROCYCLES RELATED TO 2,4-DIBORA 1,3-DIAZAROBENZENE
Allaoud, Smail,Frange, Bernard
, p. 129 - 136 (2007/10/02)
The reaction of ortho-substituted arylamines oY-C6H4NH2 (Y=H, Cl, Br, Me) with BX3, (X=F, Cl, Br, I) was investigated.By suitable choice of Y and X, this reaction may be directed to obtain, in a quantitative way, a new kind of heterocycle I instead of the expected trimeric species (oYC6H4NBX)3.The formation of I was found to be related to the bulk of Y substituent and to the nature of X, increasing in the order BCl3 a tertiary amine added, always gives the corresponding borazines.Some derivatives of I were prepared (X=Me, Y=Br, Me) and characterized by NMR (1H, 13C and 11B) and mass spectra. In connection with this study, we were led to the question of atropisomerism in the N-triarylborazines (oYC6H4NBX)3 when the starting arylamine bears an ortho substituent Y.As far as the compound Y=Me, X=Me is concerned, a sole isomer, the C3t one, could be obtained instead of the two expected.
