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Does the exclusion rule apply to H2O?
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- Why is 133C-133C spin-spin splitting not observed in ordinary organic compounds?Molecular Recognition (Supramolecular Chemistry) in organic chemistry deals with the "lock and key " mechanisms that form new molecules. However, little is known of this subject when moleules go beyond 1500 daltons (g/mole) for example macromolecules of polyolefins (polyethylene, polypropylene), thermoplastic polyesters and polyamides (nylon). It is understood that pre-directional H bonding is the mechanism of molecular recognition of macromolecules. Question: What is the immediate and post manifestation of inducing molecular recognition to condensation polymers and ring opening polymerization polymers like thermoplastic polyesters (PET ), and Nylon 66, 6 etc. (polyamides)?Classify the 19F nuclei in PF5 into chemically or magnetically equivalent groups. Give your reasoning.
- 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.The moment of inertial of 12 C-16 O is I = 1.454 × 10°46 kg*m². The molecule also has a force constant for the C-O bond of 1920N*m. Take the atomic masses of 12 C to be 12.00aμ and 160 to be 16.00aµμ and the conversion factor from 16 atomic mass unit to kg to be 1, 66054 x 1027 kμ. a) Calculate the bond length for the 12 C-1 O molecule b) Calculate a the reduced mass for the 12 C-16 O molecule c) Calculate the vibrational frequency of 12 C-160 d) Calculate the zero point vibrational energy of this molecule e) Calculate the moment of inertia for the molecule f) Calculate the rotational energy of the J = 1 and J = 2 energy levelsWhat is the physical origin of the specific selection rule ΔJ= ±1
- Is the bond length in 1HCl the same as that in 2HCl? The wavenumbers of the J = 1 ← 0 rotational transitions for 1H35Cl and 2H35Cl are 20.8784 and 10.7840 cm–1, respectively. Accurate atomic masses are 1.007 825mu and 2.0140mu for 1H and 2H, respectively. The mass of 35Cl is 34.968 85mu. Based on this information alone, can you conclude that the bond lengths are the same or different in the two molecules?Assume that the first line of the rotational spectrum (J = 0 → J = 1) of CO is 3.8424 cm-1. Calculate the length of the CO bond in picometer (10-12 m). To mark the answer, neglect the fractional part and do not write the unit. Information: mass of carbon: 12 c.u. mass of oxygen: 16 c.u. h = 6,6261 x 10-34 J.s π = 3,1416 c = 2,9979 x108 m.s-1 N = 6,0221 x 1023 mol-1The benzene radical anion has g = 2.0025. At whatfield should you search for resonance in a spectrometeroperating at (a) 9.302 GHz, (b) 33.67 GHz?
- 10. Calculate the frequency and wavenumber of the J = 32 transi- tion in the pure rotational spectrum of 14N160. The equilibrium bond length is 115 pm. Does the frequency increase or decrease if centrifugal distortion is considered? (3.07E11 Hz, freq. decreases with distortion) R=115pm R= ħ² 2μhc B M= (14) (16) = 7.467 amu (14+16) 1.06x102² kg/amuWhich of the following transitions are allowed by selection rules? please in each case explain the answer by step and show the work (1) 1S0 → 3P0 (2) 3D3 → 4D1/2 (3) 3S3 → 3P1 (4) 3G3 → 3G4 (5) 2F5/2 → 2P1/21. 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?