Zobrazeno 1 - 10
of 207
pro vyhledávání: '"Richard J. Lagow"'
Publikováno v:
Journal of Fluorine Chemistry. 125:749-754
We wish to report synthesis of perfluorinated functionalized, branched ethers from their hydrocarbon analogues by direct fluorination. Yields up to 90%, with high purities, have been obtained at ambient temperature and pressure. This technique will l
Autor:
Richard J. Lagow, Kyle W. Felling
Publikováno v:
Journal of Fluorine Chemistry. 123:233-236
We wish to report a high-yield synthesis of perfluorinated tertiary amines from their hydrocarbon analogues by direct fluorination. Yields up to 70%, with high purities, have been obtained from certain tertiary amines. This technique will likely deve
Autor:
Petros A. Psathas, Daniel Mitchell, Kwon Taek Lim, Edward A. Sander, Richard J. Lagow, Keith P. Johnston, Won Ryoo
Publikováno v:
Journal of Dispersion Science and Technology. 23:81-92
Measurements of the interfacial tension, γ, for water-CO2-perfiuoropoly ether (PFPE) ionic surfactant systems are utilized to understand the surfactant affinity for the various phases and adsorption at the interface. A marked decrease in γ with sal
Publikováno v:
Inorganic Chemistry. 40:2751-2755
Extremely large carbon tubes, some exceeding 5 microm in diameter, were produced with both laser and electric arc techniques using graphite, a transition metal catalyst, and a reactive third-body gas. We have named these structures carbon megatubes.
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :2805-2809
Bis(benzo-15-crown-5)buta-1,3-diyne and bis(benzo-15-crown-5)octa-1,3,5,7-tetrayne were successfully synthesized and characterized by X-ray crystallography. Experiments with poly[bis(benzocrown ethers)diacetylene] were also studied.
Publikováno v:
Angewandte Chemie. 110:1630-1633
Autor:
Han-Chao Wei, Scott L. Battle, Joel J. Kampa, Raymond C. Stevens, James F. Haw, John W. Genge, Carla J. Harper, David A. Laude, Robert Bau, Richard J. Lagow, Daniel R. Mitchell, Eric J. Munson
Publikováno v:
TANSO. 1998:27-33
A new carbon allotrope based “sp” hybridization contaning alternating triple and single bonds (an acetylenic or linear carbon allotrope) has been prepared. Studies of small (8 to 28 carbon atoms) acetylenic carbon model compounds show that such s
Publikováno v:
Organometallics. 16:789-792
Ether cleavage of THF at low temperature affords halide-free neohexyllithium in a two-step reaction via insertion of in situ formed ethylene into the C-Li bond of tert-butyllithium. The crystal structure analysis reveals the formation of tetrameric T
Autor:
Kuangsen Sung, Richard J. Lagow
Publikováno v:
Synthetic Communications. 26:375-386
Novel low molecular weight perfluorinated polyformaldehydes with stable and unreactive perfluoro-n-butyl end groups were prepared by liquid-phase direct fluorination. The new perfluoropolyether fluids have a very long liquid range and low melting poi
Autor:
Richard J. Lagow, Falk Olbrich
Publikováno v:
Zeitschrift f�r anorganische und allgemeine Chemie. 621:1929-1932
Tris(triphenylphosphine)gold(I)-pentafluorosilicate(IV) ([Au{P(C6H5)3}3][SiF5]) was prepared and the structure was determined by single crystal x-ray diffraction. The complex crystallizes in the triclinic space group P1 (No. 2). The lattice constants