steric strainvan der Waals strainStrain is one of the most important factors to analyze and understand physical and chemical properties of matter in the macroscopic and microscopic world. This chapter introduces a series of rules in organic chemistry to rationalize the origin of strain. It also ...
What is steric strain in organic chemistry? What is steric effect in organic chemistry? What is steric hindrance in organic chemistry? What are substituents in organic chemistry? What are conformations in organic chemistry? What are reagents in organic chemistry?
ChemInform Abstract: Steric Strain and Reactivity of Epoxynorbornanes (3-Oxatricyclo[3.2.1.02,4]octanes)organic chemistry, reviewoxirane derivativesChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ...
Steric strain (or steric tension) Steric interactions, whether between electrons or atoms, always result in a rise in the energy of a system. Systems with higher energies are more unstable than systems with lower energies. Figure 1 depicts cyclohexane conformations as an example of this. Figure ...
Steric strain in the C=N-C fragment in 3,5-disubstituted N-acyl-1,4-benzoquinone monoimines, unlike their N-arylsulfonyl analogs, leads to increase of the ... A.,P.,Avdeenko,... - 《Russian Journal of Organic Chemistry》 被引量: 0发表: 2013年 Structure, stability, and cluster-cage...
18.The Study on Establishment of Strain Evaluation System and Susceptivity of Mental Workers;脑力劳动者紧张效应评价体系建立及易感性研究 相关短句/例句 stereoscopic effect立体效应 1.The study on the relation between the structure parameters of 142 carbon atoms in 39 amine(compounds) and their ~(13)...
Radicals α to a carbonyl group 8 are considered as planar, delocalized in a manner similar to an enolate anion and the observed stereoselectivities can generally be rationalized using the concept of 1,3-allylic strain (Scheme 2) <1999CRV1191>. In this planar radical model, the CH bond at...
The ortho effects of alkyl groups are now fairly well understood and they may be interpreted largely in terms of F-strain interactions and steric inhibition of resonance. The highly polar nature of the halogen substituents has made the a... DH Mcdaniel,HC Brown - 《Journal of the American ...
Highly Like-Selective [4 + 2] Cycloadditions of Chiral Dienols: The Importance of 1,3-Allylic Strain in the Hydroxy-Directed Stereocontrol W Adam,J Glaeser,K Peters,... - 《Journal of the American Chemical Society》 被引量: 205发表: 1995年 Diastereoselectivity in the Carroll rearrangement ...
The 1,1-disubstituted monomers have values of (−ΔHp) lower than those for monosubstituted monomers by 20–40 kJ mo−1, this representing the steric strain built into the chains. The high CC bond strength in fluorocarbons probably contributes to the high value of −ΔHp for tetra-...