NMRthermochemistryX-ray crystallographyDecades of research on the structure of the 2-norbornyl cation afford a new understanding of bonding in carbon compounds and of the electron-donor capacity of carboncarbon bonds. The bridged or nonclassical structure of the 2-norbornyl cation, which features 3-...
Proton transfer and hydrogen bonding are two aspects of the chemistry of hydrogen that respectively govern the behaviour and structure of many molecules, b... EMSLEY,J - 《Chemischer Informationsdienst》 被引量: 305发表: 1985年 Synthesis of new adducts and co-ordination complexes of zirconium and...
Bonding mode of nitrogen heterocyclic ligands to (.eta.5-cyclopentadienyl)ruthenium cation and reactivity studies of the nitrogen and .pi.-bonded complexes... Bonding mode of nitrogen heterocyclic ligands to (.eta.5-cyclopentadienyl)ruthenium cation and reactivity studies of the nitrogen and .pi.-...
Compared to [H2AnO], the actinide-hydrogen bonding appeared to be enhanced in the actinide sulfides through back-bonding of a S(3p) electron pair to a vacant 6d orbital, which is delocalized over the H atoms. This unique covalent bond is favored by the inductive effect of the hydride ...
Some stabilization, however, should result from π-backbonding by the d10 gold(I) centers. If each gold(I) center were as strong a π-donor as phenyl, as studies by Widenhoefer and coworkers suggest [29], [(LAu)3C]+ might bear a closer electronic resemblance to the trityl cation [...
(as opposed to C=C) bridge and resulting in an unsymmetrical distribution of the remaining spin density from the central ring onto the peripheral NHB (6%) and NHC (27%) ligands. As such, 1•+can be described by several contributing resonance forms (Fig.4a): (i) C-centred pyridyl ...
A bonding interaction between the Cr(H 2O) 63+ t 2g (π n) and approximately nonbonding e g ((H 2O) 5Cr) 2O 4+ orbitals, accompanied by protonation of the oxo bridge, is proposed to account for the distinctive catalytic activity of the chromic ion. Unexpectedly greater resistance of...
Anovelintriguingtypeofcoordinationmode in phosphorus chemistry has been established that is of fundamental interest in the understanding of chemical bonding. Besides the synthesis of the first planar phosphonium cation PR4+1 by a surprisingly simple metathesis reaction, a potentially general experimental ...
mutation of R212 to a cysteine led to a reduction in transport Vmaxand a decrease in Km. This is consistent with the assumption that interactions with R212 are required for an effective transport cycle. Our MD simulations show that R212 participates in an extended hydrogen bonding network, whi...
It is possible that the polar/charged Asn and Asp side-chains introduced in position 440 of GLT-1 could also enlarge the Na2 site, by virtue of their hydrogen bonding capability. As a result, the capability of a lithium ion to be stably coordinated would be expected to be affected more ...