Zobrazeno 1 - 10
of 12
pro vyhledávání: '"35"'
Autor:
Carolyn B. Knobler, Emily F. Maverick, Kenneth N. Trueblood, S. Bruce Brown, Roger C. Helgeson, Donald J. Cram, Takahiro Kaneda
Publikováno v:
Journal of the American Chemical Society. 107:3645-3657
k2Cs2 = (~~~IU,/KSH+)~~C S~CH+C~,~~,+~,) Abstract: Spherands 1-5 and the related macrocycle 6 which are described in this paper are composed mainly of four to six aryloxy units attached to one another in such a way that the orbitals of the unshared e
Autor:
Frederick G. Bordwell, J.-P. Cheng
Publikováno v:
Journal of the American Chemical Society. 113:1736-1743
Oxidation potentials for 35 phenoxide ions and 3 naphthoxide ions have been combined with their pK HA values to estimated homolytic bond dissociation energies (BDEs) for the O-H bonds in phenols. Comparison with literature values shows that there is
Publikováno v:
Journal of the American Chemical Society. 121:11904-11905
Xenon is the most reactive stable rare gas, and its chemical properties have been widely explored since the discovery of the first xenon-containing compound by Bartlett in 1962.1,2 Usually, extremely electronegative substances are required to make a
Publikováno v:
Journal of the American Chemical Society. 138:2500-2503
The synthesis and isolation of stable main group radicals remains an ongoing challenge. Here we report the application of frustrated Lewis pair chemistry to the synthesis of boron-containing radicals. H2 activation with polyaromatic diones and B(C6F5
Autor:
Johannes A. M. Hepperle, Brooks J. Culotta, Gerhard Erker, Allan Jay P. Cardenas, Stefan Grimme, Jeffrey L. Petersen, Roland Fröhlich, Armido Studer, Timothy H. Warren, Gerald Kehr, Constantin G. Daniliuc, Annika Stute, Birgitta Schirmer, Muhammad Sajid
Publikováno v:
Journal of the American Chemical Society
The intramolecular cyclohexylene-bridged P/B frustrated Lewis pair [Mes(2)P-C(6)H(10)-B(C(6)F(5))(2)] 1b reacts rapidly with NO to give the persistent FLP-NO aminoxyl radical 2b formed by P/B addition to the nitrogen atom of NO. This species was full
Publikováno v:
Journal of the American Chemical Society. 134:2520-2523
The reaction of a class I ribonucleotide reductase (RNR) begins when a cofactor in the β subunit oxidizes a cysteine residue ~35 Å away in the α subunit, generating a thiyl radical. In the class Ic enzyme from Chlamydia trachomatis (Ct), the cyste
Publikováno v:
Journal of the American Chemical Society. 133:18420-18432
Escherichia coli ribonucleotide reductase is an α2β2 complex that catalyzes the conversion of nucleotides to deoxynucleotides using a diferric tyrosyl radical (Y(122)(•)) cofactor in β2 to initiate catalysis in α2. Each turnover requires revers
Publikováno v:
Journal of the American Chemical Society. 119:2795-2803
Precursors for the selective generation of C-2 glyceryl radicals were synthesized, and the chemical behavior of the corresponding radicals was investigated by ESR spectroscopy, product analysis, and kinetic measurements. It was found that cleavage of
Publikováno v:
Journal of the American Chemical Society. 118:9831-9840
Photostimulated additions of tert-butylmercury halides to 1,6-dienes and enynes, including (CH2CHCH2)2X with X = CH2, C(COEt)2, O, or NCH2CHCH2, form the primary alkylmercury halides resulting from 5-exo-cyclizations of the adduct radicals, t-BuCH2CH
Publikováno v:
Journal of the American Chemical Society. 114:2277-2279
The recent isolation of fullerenes such as C{sub 60} and C{sub 70} has led to several studies of the reactivity and physical properties of their excited states. The authors recently reported that triplet C{sub 60} ({sup 3}C{sub 60}) is formed with a