What is the number of possible allowed electronic transitions for carbon atom? Electron configuration 's ¹'D ³p S-S coupling L-L coupling ¹So ¹D₂ ³P₂ ³P₁ ³Po L-S coupling Energy
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- Why is there no zero point energy associated with roational spectroscopy.Explain the concept of Fourier Transform IR spectroscopy ?Q1 :A With reference to the 3f 1d 3p 1g and Is terms of a d2 configuration ,explain how you can use term symbols to gain information about allowed electronic transitions. wna W wwwon
- 1) Predict the wavelength (in nm) of the lowest-energy electronic transition in the following polymethine ion, (CH3)2N+=CH-CH=CH-CH=CH-N(CH3)2. Assume C-N and C-C conjugated bond lengths to be equal to1.4Å. Please explain how you determine electron count, length, and homo/lomo for n values1. 1H 19F has a force constant of 966 N m-1. Calculate the frequency of light corresponding to the lowest energy pure vibrational transition. The mass of 1H = 1.008 amu, the mass of 19F is 18.9984 amu, and 1 amu = 1.661 x 10-27 kg. 2. Draw Tryptophan in a peptide bond. Explain all of the bonds using valence bond theory (VBT). Next, explain where VBT fails and how molecular orbital theory is a better description of key regions of this amino acid and the peptide bonds it forms with other residues. 3. Below are the molecular orbital diagrams for B2, C2, and N2. Please use it to predict the bond order for B2, B2+ ,B2 -, C2, C2+, C2 -, N2, N2+, and N2-. Which of these molecules or ions would be paramagnetic? (The diagram has been attached) 4. What are the shapes of the molecular orbitals described in 3 above?An electron in the 7 orbital of ethylene (C,H,) is excited by a photon to the * orbital. Do you expect the equilib- rium bond length in the excited ethene molecule to be greater or less than that in ground-state ethene? Will the vibrational frequency in the excited state be higher or lower than in the ground state? Explain your reasoning.
- For the cation Ti?*: which of the following statements is false? Given: Ti (Z = 22) * O The free ion has 45 microstates. O The ground state term of the free ion is ³F, 2° The metal ion has a d? electronic configuration. O The spin, S, of the ion is equal to 3. Regarding the selection rules in spectroscopy, which of the following statements is false? * Transitions between states of different multiplicities is allowed. O Ap - d transition is allowed since Al = +1. %3D Spin-allowed transitions have a large absorption coefficient, ɛ. O In a triplet to triplet transition, AS = 0.Use the Analytical procedures in analytical chemistry to gain qualitative and quantitative information about palm oil adulterated with Sudan IV dye. Use the Raman spectroscopy as the analytical method.You are considering purchasing a new NMR instrument so that you can do H1 NMR. Suppose one instrument would provide a magnetic field of 10T and another would provide a field of 3T. For a given molecule, would these two instruments have two different absorption wavelengths between spin states? If so, calculate the two different wavelengths that would cause absorption, ignoring the itnernal magnetic field of the molecule.
- When an electron occupies a 2s orbital on an N atom it has a hyperfine interaction of 55.2 mT with the nucleus. The spectrum of NO2 shows an isotropic hyperfine interaction of 5.7 mT. For what proportion of its time is the unpaired electron of NO2 occupying a 2s orbital? The hyperfine coupling constant for an electron in a 2p orbital of an N atom is 3.4 mT. In NO2 the anisotropic part of the hyperfine coupling is 1.3 mT. What proportion of its time does the unpaired electron spend in the 2p orbital of the N atom in NO2? What is the total probability that the electron will be found on (a) the N atoms, (b) the O atoms? What is the hybridization ratio of the N atom? Does the hybridization support the view that NO2 is angular?The number and position of electronic spectral bands depend on some factors. Explain.The Beer–Lambert law is derived on the basis that the concentration of absorbing species is uniform. Suppose, instead, that the concentration falls exponentially as [J]=[J]0e-x/x0. Develop an expression for the variation of I with sample length; suppose that L >> x0.