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Determine which of those modes should be IR-active, and then circle your choices below. Mode 1 Mode 2 Mode 3 Mode 4

Determine which of those modes should be IR-active, and then circle your choices below. Mode 1 Mode 2 Mode 3 Mode 4

Chemistry
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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**Vibrational Modes of Trigonal Planar BF₃ Molecule** **Description:** Here we explore the four possible vibrational modes of a trigonal planar BF₃ molecule. Each mode is represented with arrows indicating the direction of motion. Arrows within the plane of the paper signify planar motion, while the + and – signs denote movements in and out of the plane. **Mode 1:** - The two fluorine atoms on the left and top move outwards, while the right-side fluorine moves downward, all within the plane of the paper. **Mode 2:** - Two of the fluorine atoms (left and right) move out of the plane (+), while the central boron and the bottom fluorine move into the plane (-). **Mode 3:** - The top fluorine atom moves outwards within the plane, while the central boron and bottom fluorine move vertically in alignment. **Mode 4:** - The left and right fluorine atoms move in opposite directions within the plane, while the top and bottom atoms, including boron, move vertically. **Instructions:** - Determine which of these modes should be IR-active and indicate your selection below. - Options: Mode 1, Mode 2, Mode 3, Mode 4 This exercise aids in understanding vibrational spectroscopy and the infrared activity of different vibrational modes.
Transcribed Image Text:**Vibrational Modes of Trigonal Planar BF₃ Molecule** **Description:** Here we explore the four possible vibrational modes of a trigonal planar BF₃ molecule. Each mode is represented with arrows indicating the direction of motion. Arrows within the plane of the paper signify planar motion, while the + and – signs denote movements in and out of the plane. **Mode 1:** - The two fluorine atoms on the left and top move outwards, while the right-side fluorine moves downward, all within the plane of the paper. **Mode 2:** - Two of the fluorine atoms (left and right) move out of the plane (+), while the central boron and the bottom fluorine move into the plane (-). **Mode 3:** - The top fluorine atom moves outwards within the plane, while the central boron and bottom fluorine move vertically in alignment. **Mode 4:** - The left and right fluorine atoms move in opposite directions within the plane, while the top and bottom atoms, including boron, move vertically. **Instructions:** - Determine which of these modes should be IR-active and indicate your selection below. - Options: Mode 1, Mode 2, Mode 3, Mode 4 This exercise aids in understanding vibrational spectroscopy and the infrared activity of different vibrational modes.
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