In addition to the visible peaks seen in the H emission spectrum, there are other transitions occurring that give peaks detected in the ultraviolet (UV) region and in the infrared (IR) region of the electromagnetic spectrum. Compared to the transitions that emit visible light, would transitions in the UV region: (a) have a longer or shorter wavelength than the visible transitions and (b) correspond to greater energy or less energy than visible transitions? Explain your answer.
a) What kind of low-UV/visible light electronic transitions are these molecules expected to have: MLCT, LMCT, LF transitions (two types: spin allowed orbit forbidden; spin and orbit allowed), or none (1.e. none if all transitions are spin forbidden)? For practice, determine the point group. i. [Ru(bipy):12+ ii. [Co(NH3)6]2+ iii. [Mn(OH2)6]2+ iv. [V(OH2)s(O)]+ V. [Ti(C1)4] vi. [Cu(NH3)4]**
The allowed UV symmetry transitions for PF5 (a D3h molecule) are A1g, B1g, and B2g. Explain why these three are allowed.
Define IR radiation and explain how it differs from UV and visible radiation.
Briefly explain what you would expect to see in the UV-visible spectra of the first two compounds you will prepare in this experiment, [Ni(NH3)6][BF4]2 and [Et4N]2[NiCl4]. Which would you expect to give the stronger absorptions, and why?
what are the allowed symmetry transitions for PF5 for UV (3) and raman (6)?
5. In the UV-visible spectrum of (E)-1,3 ,5-hexatriene, the lowest energy absorption corresponds to ______________. A) a pi to pi^* transition B) a pi to pi^8 transition C) a pi to sigma^* transition D) a sigma to sigma^* transition E) a sigma to pi transition F) none of these, UV-vis causes changes in stretching not electronic transitions G) none of these, UV-vis forms ions through loss of electrons
Could someone explain what the green underlined part means? It doesn't make sense to me. It says the current (induced) flows CCW (that means towards the right). Then it says it flows to the left?
Ultraviolet- visible
Explain ONE of the reasons why solvents can shift the peaks seen in UV-Vis.
could someone remind me what this means?