Electron microscope

Experiment #6: Polarimetry Resolution of (∓)-Racemate: (∓)-ɑ-Phenylethylamine OBJECTIVE All chiral molecules have a mirror image of themselves. While they have the same physical properties, they interact with other chiral molecules completely different. Since there are many chiral molecules in organics, this can lead to the need to make optically pure products. If the chemist does not, it can lead to many problems including death. In this experiment, the separation of two enantiomers was…

C-H bonds are considered nonpolar. This is because the electronegativity of C is 2.5 and the of H is 2.1, putting their electronegativity in the nonpolar range. O-H bonds are more polar than N-H bonds. This is because the O-H bond is more electronegative because the electronegativity of O is 3.44 while the electronegativity of N is only 3.04. I2(s) → I2(l) London Dispersion Forces H2O(s) → H2O(l) London Dispersion Dipole-Dipole Hydrogen Bonding NaI(s) → NaI(l) Ionic bonds C16H32(s) →…

Interpretation of the NOESY: (Nuclear Overhauser Effect) spectrum of 1-(2-methyl-1,2,3,4-tetrahydroquinolin-4-yl)azepan-2-one (3a) is as follows. Strong coupling interaction of protons of 2nd and 4th position in 1-(2-methyl-1,2,3,4-tetrahydroquinolin-4-yl)azepan-2-one (3a), was not so strongly observed in COSY because it involves long range coupling i.e. protons attached between 2nd and 4th carbon atom. Hence, we studied NOESY to know the spacial interaction between these two protons. Thus, the…

The space group for α-FePO4 is P3121, with the lattice symmetry being tetrahedral in shape. On the other hand, the space group for β-FePO4 is P6422, with the lattice symmetry being hexagonal in shape. In this writing assignment, FePO4 is studied at varying temperature ranging from 294K to 1073K by neutron powder diffraction. At a relatively low temperature, it adopts the structure of the α-quartz. However, at high pressures, it changes and it can be observed that it becomes a denser…

within the electric field is called voltage. The free electrons at the higher potential have more electrical potential energy whereas the free electrons at lower potential have less electrical potential energy. Voltage is measured in volts (V). Resistance: Resistance is the opposite force that resists the flow of electrons. The electrons that are moving freely through the conductor will collide continuously with the atoms. This causes the free electrons to lose their energy. Hence, the electric…

Paragraph 1 The structural evolution of FePO4 studied from a temperature range of 294K to 1073K by neutron powder diffraction. It is unique from α-quartz isotopes. It is different because it’s a cation is a transition metal. The structure dimensions and atomic coordinates in the α phase tend to increase by great amounts as the high-temperature β-phase rises and exhibit first order transition at 980K. The atomic structure dimensions of the α-phase FePO4 increased in a non-uniform pattern with…

the exact dielectric equations and reduces the outlying charge errors as compared to PCM. Isodensity PCM ( IPCM): Cavity formed using gas-phase static electronic isodensity surface (IPCM) Less arbitrary than spheres on atoms. Cavity changes with electron density and environment. The default density value is 0.0004. occurred only by single point calculations. Self-Consistent Isodensity model (SCIPCM):in which iterations are folded in SCF issues regarding scaling of charges still remain[9].…

Evie McCormack Mr. Acland B Block Physics Lab: Speed of Sound Essential Question Asked: How does the speed of sound differ between metals and gases? Background Information: The speed of sound is gauged by distance over time (distance/time). Certain aspects that can change or affect the speed of sound would include the density of the item through which the sound is traveling. Continuing on with that concept, when sound is…

but that will make the way the periodic table looks. Although, people expect the atoms of the elements to get as large or larger than their atomic number increases, this doesn’t occur because of the of the atom is determined by its diameter of the electron shell. Fact is, element atoms decrease in size as you move from left to right or across a row or period. Determining the weights scientists had passes currents through various solutions that would break them up into the constituent atoms.…

molecular structure and the physicochemical property of molecules, including biological molecules and MESP-based drugs, to distinguish electron rich zones (electrophilic attack) from electron-poor ones (a nucleophilic attack) 16, 17. We represent in this study the molecular surface of the electrostatic potential (MESP), the electrostatic potential (ESP) and the electron density (ED). MESP is a surface of the electrostatic potential with the electronic density surface. The molecular surface of…