Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Paul D. Torres"'
Autor:
Karen E. Lotterhos, and Abraham Clearfield, Paul D. Torres, Thomas R. Krawietz, Ping Lin, Dewey H. Barich, James F. Haw
Publikováno v:
Journal of the American Chemical Society. 120:8502-8511
The synthesis, structure, and acid function of solid phosphoric acid (SPA) catalyst were studied in detail. 31P and 29Si MAS NMR and X-ray powder diffraction identified the following crystalline silicon phosphate phases in SPA: Si5O(PO4)6, hexagonal-
Publikováno v:
Journal of the American Chemical Society. 119:396-405
We report the principal components of the 13C chemical shift tensors for seven acylium ions, determined by both slow speed magic angle spinning (MAS) nuclear magnetic resonance (NMR) and theoretical methods. Experimentally, the acylium ions were prep
Publikováno v:
Journal of the American Chemical Society. 119:406-414
The benzenium, toluenium, and ethylbenzenium ions were synthesized on aluminum bromide by coadsorption of the precursors with either HBr or alkyl bromide. Principal components of the 13C chemical shift tensors for the ring carbons of these species we
Publikováno v:
Journal of Business & Economics Research (JBER). 8
The Financial Accounting Standards Board promulgated standard No. 142 in an attempt to improve the understandability of accounting information. This new rule eliminated the practice of automatically amortizing goodwill. No. 142 requires public compan
Publikováno v:
International Journal of Management & Information Systems (IJMIS). 13:1
Product analytics is a blend of computational methods with the express purpose of facilitating the multifaceted process of decision-making based on demographic and consumer preferences. This complex subject is derived from consensus theory and includ
Publikováno v:
Journal of the American Chemical Society. 118:4202-4203
A characteristic common to all carbenium shift calculations reported thus far is that they have discussed only the isotropic chemical shift which is observable in solution. We have recently reported measurements of the principal components. {delta}{s
Publikováno v:
Journal of the American Chemical Society. 117:8027-8028
We report that a wide variety of carbenium ions and related electrophilic species can be prepared by the direct contact of suitable precursors with metal halide powders at reasonable temperatures and in the absence of solvent, permitting direct measu