Absolute Rate Data for Halogen Atom-Abstraction Reactions of Ground State Atomic Caesium, Cs(6 2S1/2) Determined by Time-Resolved Laser-induced Fluorescence [Cs(7 2P3/2 – 6 2S1/2); λ = 455.5 nm] Following Pulsed IrradiationAbsolute rate data are reported for reactions of ground state ...
The relatively low triplet energy is probably related to the viability of the unexpected halogen atom abstraction reactions. 展开 关键词: PNP PINCER LIGAND OXIDATIVE ADDITION PALLADIUM COMPLEXES ALKANE COMPLEXES METAL-COMPLEXES ACTIVATION ARYL CLEAVAGE PLATINUM(II DOI: 10.1039/c2sc21385k 被引量: 25 ...
syringae. This intermediate reacts via an initial hydrogen-atom abstraction step, performing subsequent halogenation of the native substrate or hydroxylation of non-native substrates17. A correlation of the experimental NRVS data to electronic structure calculations indicates that the substrate directs the...
CH3experiences a polar repulsion by the filled orbitals of the halogen atom in X–R which would be negligible with hydrogen in H–R. Thus the rate of hydrogen abstraction is greater than expected from bond energy considerations alone. Support for this view comes from Szwarc’s observations on ...
Mercury chemistry in the MBL: Modeling results including Hg + halogen atom reaction rate constantsThe inclusion, of recently published kinetic data for the reactions between gas phase elemental Hg and halogen atoms and molecules, in a ... IM Hedgecock,N Pirrone - EGS - AGU - EUG Joint Assemb...
a higher electron affinity for the electron than iodine and therefore the aluminium cluster is called a superhalogen (i.e., the vertical electron detachment energies of the moieties that make up the negative ions are larger than those of any halogen atom).[45] The cluster component in the ...
To address this issue, we reasoned that the σ-hole on the iodine atom on A could be fine-tuned by employing an iodine to bromine halogen swapping strategy. Surprisingly, using the bromide derivative Br-A as catalyst showed marked improvement (Fig. 11b) to access such challenging glycosidic ...
p-MeOC6H4N2þBF4À/TiCl3:anovelinitiatorforhalogenatom-transferradicalreactionsinaqueousmediaLidongCao,ChaozhongLi*Sh..
The rate constants for the abstraction of H atoms from CH/sub 4/, C/sub 2/H/sub 6/, and D atoms from C/sub 2/D/sub 6/ by C/sub 2/H (ethynyl) radicals have ... N Sadeghi,DW Setser,A Francis,... 被引量: 17发表: 2001年 H(D)-atom yields in the quenching of Xe(6s[3...
These substituents of electron withdrawing nature alter the properties of the glycal double bond and together with the ring oxygen atom make the C-1 centre capto-datively substituted thereby rendering such compounds to be sensitive to radical reactions [5]. As a part of a program to explore ...