Showing papers on "Carbon group published in 1998"
TL;DR: It is unlikely that superheavy element 114, which may have stable isotopes due to its magic numbers of protons and neutrons, can be studied by atom-at-a-time chemistry in the oxidation state +4.
Abstract: The stability of the oxidation state +4 decreases from silicon to element 114, as shown by relativistic and nonrelativistic calculations on the hydrides, fluorides, and chlorides of the Group 14 elements (the energies of the decomposition reaction (1) are given in the plot). Thus it is unlikely that superheavy element 114, which may have stable isotopes due to its magic numbers of protons and neutrons, can be studied by atom-at-a-time chemistry in the oxidation state +4.
111 citations
TL;DR: In this paper, photolysis of chromium alkoxy carbene complexes containing electron-rich aromatic systems on either the oxygen or carbon group of the carbene carbon resulted in intramolecular Friedel−Crafts acylation of the arene.
Abstract: Photolysis of chromium alkoxycarbene complexes containing electron-rich aromatic systems on either the oxygen or carbon group of the carbene carbon resulted in intramolecular Friedel−Crafts acylation of the arene.
19 citations
TL;DR: Stable metallaneselones and metallanetellones were synthesized by taking advantage of kinetic stabilization using an extremely bulky and efficient steric protection group, 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (denoted as Tbt) as discussed by the authors.
Abstract: Stable metallaneselones and metallanetellones [Tbt(R)M=X; M = Si, Ge, Sn, X = Se and Te],, i.e., a new family of double-bond compounds between heavier group 14 elements and chalcogen atoms (“heavy ketones”), are synthesized by taking advantage of kinetic stabilization using an extremely bulky and efficient steric protection group, 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (denoted as Tbt). The molecular structures and chemical properties of these new double-bond species are also described.
9 citations
Journal Article•
5 citations
TL;DR: In this paper, photolysis of chromium alkoxy carbene complexes containing electron-rich aromatic systems on either the oxygen or carbon group of the carbene carbon resulted in intramolecular Friedel−Crafts acylation of the arene.
Abstract: Photolysis of chromium alkoxycarbene complexes containing electron-rich aromatic systems on either the oxygen or carbon group of the carbene carbon resulted in intramolecular Friedel−Crafts acylation of the arene.