Results 81 to 90 of about 20,876 (282)

Total Synthesis of Tulearin C

open access: yes, 2011
With the help of the smaller brother: Although alkyne metathesis will always be the little brother of alkene metathesis, it allows problems to be solved that are currently beyond reach of the more famous sibling.
Fürstner, A.   +4 more
core   +1 more source

Metal‐Free Scission of the NO+ Triple Bond

open access: yesAngewandte Chemie International Edition, EarlyView.
Breaking bonds: The reaction between NO[Al(ORF)4] (RF = C(CF3)3) and the diphosphane PNPtBu (2,6‐bis(di‐tert‐butylphosphino‐methyl)pyridine) leads to the direct and complete cleavage of the NO+ triple bond, one of the strongest chemical bonds known. The mechanism of this reaction was studied using quantum chemical calculations and NMR spectroscopic ...
Julie Willrett   +3 more
wiley   +1 more source

Seasonal variations of atmospheric C2-C7 nonmethane hydrocarbons in Tokyo [PDF]

open access: yes, 2007
Eighteen C2-C7 NMHCs (nonmethane hydrocarbons) were measured hourly during the Integrated Measurement Program for Aerosol and Oxidant Chemistry in Tokyo (IMPACT) measurement campaigns conducted in central Tokyo during four different periods (summer ...
Blake, DR   +9 more
core  

Vertical distributions of non-methane hydrocarbons and halocarbons in the lower troposphere over northeast China [PDF]

open access: yes, 2011
Vertical distributions of air pollutants are crucial for understanding the key processes of atmospheric transport and for evaluating chemical transport models.
Blake, DR   +9 more
core   +2 more sources

Are biogenic emissions a significant source of summertime atmospheric toluene in the rural Northeastern United States? [PDF]

open access: yes, 2009
Summertime atmospheric toluene enhancements at Thompson Farm in the rural northeastern United States were unexpected and resulted in a toluene/benzene seasonal pattern that was distinctly different from that of other anthropogenic volatile organic ...
Ambrose, Jesse L.   +10 more
core   +1 more source

Assessment of fossil fuel carbon dioxide and other anthropogenic trace gas emissions from airborne measurements over Sacramento, California in spring 2009 [PDF]

open access: yes, 2011
Direct quantification of fossil fuel CO<sub>2</sub> (CO<sub>2</sub>ff) in atmospheric samples can be used to examine several carbon cycle and air quality questions.
A. Karion   +12 more
core   +1 more source

Computer model for refinery operations with emphasis on jet fuel production. Volume 2: Data and technical bases [PDF]

open access: yes
The FORTRAN computing program predicts the flow streams and material, energy, and economic balances of a typical petroleum refinery, with particular emphasis on production of aviation turbine fuel of varying end point and hydrogen content specifications.
Dunbar, D. N., Tunnah, B. G.
core   +1 more source

Photochemical Approaches to Complex Chemotypes: Applications in Natural Product Synthesis. [PDF]

open access: yes, 2016
The use of photochemical transformations is a powerful strategy that allows for the formation of a high degree of molecular complexity from relatively simple building blocks in a single step. A central feature of all light-promoted transformations is the
Kärkäs, Markus D.   +2 more
core   +2 more sources

Carboxylate-Assisted C(sp^3)–H Activation in Olefin Metathesis-Relevant Ruthenium Complexes [PDF]

open access: yes, 2014
The mechanism of C–H activation at metathesis-relevant ruthenium(II) benzylidene complexes was studied both experimentally and computationally. Synthesis of a ruthenium dicarboxylate at a low temperature allowed for direct observation of the C–H ...
Cannon, Jeffrey S.   +6 more
core   +1 more source

Pentane-1,5-diammonium tetrachloridopalladate(II) [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2007
In the title compound, [NH(3)(CH(2))(5)NH(3)][PdCl(4)], the square-planar [PdCl(4)](2-) anions are centrosymmetric while the diammonium cation lies in a general position. In addition to electrostatic inter-actions, the two species are linked through N-H⋯Cl hydrogen bonds to form a three-dimensional network.
openaire   +3 more sources

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