Rational Synthesis of A2B-type meso-Triarylsubporphyrins
摘要:
Rational synthesis of A(2)B-type meso-arylsubporphyrins has been accomplished by the condensation of triethylamine-tri-N-tripyrromethene-borane with acid chlorides. These subporphyrins are useful for evaluations of the intrinsic substituent effects and the influences of substitution patterns A(3)-type versus A(2)B-type substitution.
Exploiting isolobal relationships to create new ionic liquids: novel room-temperature ionic liquids based upon (N-alkylimidazole)(amine)BH2+“boronium” ions
作者:Phillip A. Fox、Scott T. Griffin、W. Matthew Reichert、E. Alan Salter、Ashley B. Smith、Morgan D. Tickell、Benjamin F. Wicker、Eugene A. Cioffi、James H. Davis, Jr.、Robin D. Rogers、Andrzej Wierzbicki
DOI:10.1039/b504631a
日期:——
Readily prepared imidazole-based boronium ions form stable, hydrophobic, room-temperature ionic liquids (RTIL) with unique electronic and spectroscopic characteristics.
Cyclic boron compounds. Part IX. Aldiminoboranes and their cyclic dimers
作者:V. A. Dorokhov、M. F. Lappert
DOI:10.1039/j19690000433
日期:——
rane (Bun2B–NCHBut)n has been prepared from t-butyl cyanide and tri-n-butylborane by two methods. It is monomeric in the vapour (at ca. 110°), when the i.r. spectrum shows a strong band at 1850 cm.–1, assigned to the asymmetric BNC stretching frequency of a linear, pseudo-cumulative BNπ-bonding system [graphic omitted]. It is mainly dimeric in benzene, as are the dihalogeno-(t-butylaldimido)boranes
Routes to the formation of 1,3,5-triaryl- and 2,4,6-trichloro-1,3,5-triarylborazines and intermediate compounds
作者:I. B. Atkinson、D. B. Clapp、C. A. Beck、B. R. Currell
DOI:10.1039/dt9720000182
日期:——
triethylamine–borane and in those which involve heating the 1 : 1 adduct of the arylamine and trichloroborane. Products isolated in these cases include diazaboranes (bisaminoboranes)[(ArNH)2BH], aminodichloroboranes [ArNHBCl2], and triazaboranes (boronamines)[ArNH·BX·NAr·BX·NArH](X = Cl or H). A possible reaction path to the formation of borazines involving these intermediates is discussed.
Absolute rate constants for some reactions of the triethylamine-boryl radical and the borane radical anion
作者:Brad Sheeller、Keith U. Ingold
DOI:10.1039/b009494n
日期:——
generated the title radicals which were found to have broad, featureless absorptions in the visible region. Rate constants for H-atom abstraction from Et3N→BH3 by cumyloxyl radicals show a small solvent dependence, e.g. 12 × 107 and 2.2 × 107 dm3 mol−1 s−1 in isooctane and acetonitrile, respectively. Rate constants for halogen atom abstraction by Et3N→BH2˙ and BH3˙− from a number of chlorides and bromides
A meso‐free subporphyrin was prepared and quantitatively converted into meso‐brominated subporphyrin, which is an effective precursor for the facile installation of substituents at the meso position. The meso‐(4‐amino)phenylethynyl subporphyrins (see picture; N blue, O red, Br orange, F pale green, B dark green) and a butadiyne‐bridged dimer have split Soret‐like bands and red‐shifted and intensified