Absorption and emission of electronic energy:a) You find two bottles in the lab that have lost their labels. You know that the twocompounds are 2,3-dimethyl-1,3-butadiene and 2,5-dimethyl-1,3,5-hexatriene. Youfind that UV absorbance maxima are at 226 nm and 252 nm. Which spectrum belongsto which compound? How do you know this?H.HSegment ofa sheet ofgraphiteCH3CH3Hb) The (n to *) transition of N=0 has a maximum at 660 nm, while the ( to *) transition in C=C is at 180 nm.Why would the transition for the N=O molecule be at a much longer wavelength? You may wish to use simpleHOMO and LUMO energy diagrams for clarity.CH₂c) Diamond and graphite are allotropic forms of carbon. Consider the molecular structures shown and the typesof bonds. Use them to explain why graphite (LEFT) is black while diamonds (RIGHT) are colourless.Segment ofa diamond

The main aim of this question is to show the differences in electronic transitions and bonding…

Absorption and emission of electronic energy: a) You find two bottles in the lab that have lost their labels. You know that the two compounds are 2,3-dimethyl-1,3-butadiene and 2,5-dimethyl-1,3,5-hexatriene. You find that UV absorbance maxima are at 226 nm and 252 nm. Which spectrum belongs to which compound? How do you know this? H. H CH3 CH₂ H CH₂ b) The (n to *) transition of N=0 has a maximum at 660 nm, while the (a to *) transition in C=C is at 180 nm. Why would the transition for the N=O molecule be at a much longer wavelength? You may wish to use simple HOMO and LUMO energy diagrams for clarity. c) Diamond and graphite are allotropic forms of carbon. Consider the molecular structures shown and the types und Use them to explain why graphite (LEFT) is black while diamonds (RIGHT) are colourless.

Absorption and emission of electronic energy: a) You find two bottles in the lab that have lost their labels. You know that the two compounds are 2,3-dimethyl-1,3-butadiene and 2,5-dimethyl-1,3,5-hexatriene. You find that UV absorbance maxima are at 226 nm and 252 nm. Which spectrum belongs to which compound? How do you know this? H. H CH3 CH₂ H CH₂ b) The (n to ) transition of N=0 has a maximum at 660 nm, while the (a to ) transition in C=C is at 180 nm. Why would the transition for the N=O molecule be at a much longer wavelength? You may wish to use simple HOMO and LUMO energy diagrams for clarity. c) Diamond and graphite are allotropic forms of carbon. Consider the molecular structures shown and the types und Use them to explain why graphite (LEFT) is black while diamonds (RIGHT) are colourless.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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