170 research outputs found
Do the C-H Bonds Contribute to the Stabilization Energy of Benzene?
The stabilization energy of benzene (SE) is proposed to be ·
calculated from the increments of heats of formation in the homologous
series of conjugated polyenes. In this way 19.7 and 23.0
kcal/mol* are derived for $E, when benzene is compared to trans
and cis type polyenes, respectively. A comparison of the estimated
C-C bond energy of benzene to that of olefins leads to the conclusion
that C-C bonds are responsible for only about 2/3 of SE. It is
suggested that the rest of SE is connected with the difference in
strength of the aromatic and olefinic C-H bonds
Do the C-H Bonds Contribute to the Stabilization Energy of Benzene?
The stabilization energy of benzene (SE) is proposed to be ·
calculated from the increments of heats of formation in the homologous
series of conjugated polyenes. In this way 19.7 and 23.0
kcal/mol* are derived for $E, when benzene is compared to trans
and cis type polyenes, respectively. A comparison of the estimated
C-C bond energy of benzene to that of olefins leads to the conclusion
that C-C bonds are responsible for only about 2/3 of SE. It is
suggested that the rest of SE is connected with the difference in
strength of the aromatic and olefinic C-H bonds
A Kinetic Contribution to the Knowledge of Carbon-rings
A mechanism involving a cyclic intermediate has been suggested by Welsh and Fodor independently. To obtain a deeper insight acyl shifts with (1) 2-acylamidocyclopentanol-cis (2) 2-benzamidocyclohexanol-cis
and (3) trans have been -investigated kinetically with hydrochloric acid in dry dioxan
A Kinetic Contribution to the Knowledge of Carbon-rings
A mechanism involving a cyclic intermediate has been suggested by Welsh and Fodor independently. To obtain a deeper insight acyl shifts with (1) 2-acylamidocyclopentanol-cis (2) 2-benzamidocyclohexanol-cis
and (3) trans have been -investigated kinetically with hydrochloric acid in dry dioxan
Long-term following-up of viability of spleen autotransplants in the Beagle canine model
Quantitative iTRAQ-Based Proteomic Identification of Candidate Biomarkers for Diabetic Nephropathy in Plasma of Type 1 Diabetic Patients
# The Author(s) 2010. This article is published with open access at Springerlink.com Introduction As part of a clinical proteomics programme focused on diabetes and its complications, it was our goal to investigate the proteome of plasma in order to find improved candidate biomarkers to predict diabetic nephropathy. Methods Proteins derived from plasma from a crosssectiona
Non-PEG-Derived Polyethers as Solid Supports. 1. Synthesis, Swelling Studies, and Functionalization
Sensitive electrospray mass spectrometry analysis of one-bead-one-compound peptide libraries labeled by quaternary ammonium salts
Effects of allopurinol and preconditioning on apoptosis due to ischemia-reperfusion on a double jejunum-segment canine model
A modified microsurgical model for end-to-side selective portacaval shunt in the rat: intraoperative microcirculatory investigations
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