Solid-state C NMR spectra of the 2-norbornyl cation shows that carbons 1 and 2 are in identical chemical environments, which is consistent only with the non-classical picture of the 2-norbornyl cation.
12.
The first picture is a classical picture of vibrating charges, but then if you describe this more precisely using quantum mechanics, each such vibrating charge is an ( approximate ) harmonic potential and there are then energy levels here too.
13.
I guess the classical picture is kind of misleading, because the typical picture of SN2 seems to be of say, the better nucleophile " pushing " away the leaving group through backside attack, forming and breaking bonds simultaneously that way.
14.
By systematically decomposing the 2-norbornyl cation and analyzing the amount of radioactive isotope in each decomposition product, researchers were able to show further evidence for the non-classical picture of delocalized bonding ( " see Figure 9 " ).
15.
The most dramatic change in the topology from the classical picture to the new is that points are no longer necessarily closed; by expanding the definition, Grothendieck introduced generic points, which are the points with maximal closure, that is the minimal prime ideals.
16.
So in fact, before that carbon converts to sp3, it's like the alkoxy oxygen's lone pair is participating in the pi system and pushing the existing bonding electrons away . ( Okay this might be an unacceptable classical picture though .)
17.
A very classical picture, one of a handful of women posing nearly nude ( fig . 1 ), shows the sharpest contrast to the British woman of the era, who was just doing away with the corset and donning dresses with naked legs and arms.
18.
The classical picture of a physical string with substructure that might be arbitrarily positioned really isn't helpful since the eigenstates of a quantum string are only allowed to be pure vibrations with an integer number of waves . talk ) 02 : 08, 4 March 2010 ( UTC)
19.
The C NMR spectrum of the 2-norbornyl cation at-150 �C shows that the peaks corresponding to carbons 1 and 2 are split by less than 10 ppm ( parts per million ) when this experiment is carried out, indicating that the system is not undergoing a rapid equilibrium as in the classical picture.
20.
This can be understood with the following classical picture : if we imagine that the spin angular momentum is created by the electron mass spinning around some axis, the electric current that this rotation creates circulates in the opposite direction, because of the negative charge of the electron; such current loops produce a magnetic moment which is antiparallel to the spin.
