Content: - Comparison of CH3 and CH2 KER - KER assignment for the two color experiment dissociation at 270 nm and probing of CH3 at 329.500 nm (211 transition)

Slides:



Advertisements
Similar presentations
HBr, E(1), one-color, VMI KER spectra VMI, E(1) vs J´(=J´´)………………………………………2 Branching ratios……………………………………………………………..3-4 Prediction calculations……………………………………………………5.
Advertisements

A3.2 - Hexane and Bromine Hexane and Bromine are mixed together in three tubes and each tube is then exposed to a different light level.
Photodissociation of Methyl Nitrite from the S 2 state -- Ion Images and Vector Correlations Aidan Klobuchar, and Jeffrey Bartz Department of Chemistry,
Comparison of E(1), V(m+8), H(0) and V(m+7) VMI data: 1 color exp: KER spectra, 1color exp.……………………..…………..2-5 Beta2 vs J´,1 color exp.…………………………………….6-10.
CH3Br, Energy for CH3Br ->->-> CH3 + Br
Chapter 4 THE STUDY OF CHEMICAL REACTIONS The Study of Chemical Reactions.
Reactions of Alkanes IB. Combustion of alkanes Alkanes are unreactive as a family because of the strong C–C and C–H bonds as well as them being nonpolar.
Thomas J. Preston, Michael A. Shaloski, and F. Fleming Crim Infrared Transient Absorption Spectroscopy of Bromoform Isomerization.
C Cl: CH 3 H.. S N 2 ANIMATION ENERGY PROFILE R. C Cl: CH 3 H :Br:.. S N 2 ANIMATION ENERGY PROFILE R.
CH 2 Br 2 : 1)IE (ionization energy) 2)Laser induced photodissociation and ionization 3)Papers 4) Energetics agust,www,…ch2br2/PPT ak.ppt agust,heima,….CH2Br2/XLS ak.xls.
CH2Br2: 1) Absorption 2) REMPI scans: overview (slides 12-15) 3) C+ REMPI vs absorption spectrum agust,www,....ch2br2/PPT ak.ppt agust,heima,...CH2Br2/PXP ak.pxp.
CH3Br, C atomic line assignments Agust, heima,....Sep09/CH3Br 16500_ vhw.pxp Agust, www,....Sept09/PPT ak.ppt.
cm CH 3 Br 10k 40k 70k CH 3 Br* C*( 1 D 2 )+H 2 +HBr C**( 1 D 2 )+H 2 +HBr J’’ k 150k C + +H 2 +HBr+e.
Pnt sqrt(Mw) Mw H Br Br CH379Br CH381Br+ pnt Sqrt(Mw) Coefficient values ± one standard.
CH3Br, HBr detection agust, www,...Sept09/PPT ak.ppt.
CH 3 Br, Ion energetics agust,heima,...CH3Br/AFSTODUMYND hrh.pxp agust,www,....ch3br/PPT ak.ppt.
CH3Br, )PD summary status 2)Thresholds for direct excitations 3)CH3+ formation energetics / thresholds (direct and indirect)/ PD agust, heima,.....Dec09/CH3Br-Overall.
CH 2 Br 2 agust,www,...rempi/ch2br2/PPT ak.ppt agust,heima,....CH2Br2/Long, Sept-11/Merged CH2Br2 spectra jl ak.pxp.
CH3Br, HBr spectra Agust, heima,... Jan10/CH3Br18750_19250-Hbr-sim km ak.pxp Agust, www,...Jan10/PPT ak.ppt.
1 CH3Br, C, C* and C** dissociation formation channels vs C+ spectra Explanation for enhanced C+ Rydberg state spectra in the cm-1.
1 CH3Br, agust, heima,....Sept09/XLS ak.xls agust, www,....Sept09/PPT ak.ppt agust,heima,....Sept09/C ion lines vhw.pxp.
CH3Br agust,www,...Sept09/PPt ak.ppt agust,heima,....Sept09/CH3BR avhwak.pxp agust,heima,....Sept09/CH3BR bvhwak.pxp.
CH3Br, : Energetics for CH 3 Br(g) -> H2(g) + C(g) + HBr(g) agust,heima,...Nov09/PPT ak.ppt.
CH3Br Br atomic lines, summary : agust, heima,....Sept09/Br atomic lines vhw.pxp agust, heima,....Sept09/PD vhw.pxp agust, heima,....Sept09/PD vhwak.pxp.
Alkenes and Cycloalkenes
CHEM /10/12 I.B. Stratospheric chemistry: Ozone - The Chapman Mechanism - cont. Embedded Fundamentals - Photochemistry  KEEP READING CH 1  HW#3.
Plan for HBr VMI experiments in FORTH, autumn 2014 & progress -one and two-color experiments States to study……………………………………………….2-3 Rotational lines……………………………………………….4-5.
Effects of Reactant Rotational excitation on Cl + CH 4 / CHD 3 Reactions Speaker: Huilin Pan Supervisor: Kopin Liu 69 th ISMS, June 16-20, 2014.
Eirík´s project(?) CH3I: agust,www,...rempi/ch3i/PPT ak.ppt ( )
Suman K. Pal, Patrick Z. El-Khoury, Andrey S.
6.14 Addition of Halogens to Alkenes. + X2+ X2+ X2+ X2 X X electrophilic addition to double bond forms a vicinal dihalide C C C C General features.
Light CH 4 + xs Br 2  CH 3 Br + HBr  CH 2 Br 2 + HBr  CHBr 3 + HBr  CBr 4 +HBr Traditional statement of overall methane (CH 4 ) + excess(xs) bromine.
HBr, V(m+8), one-color, VMI One-color: KER spectra VMI, V(m+8) vs J´(=J´´)…………………………………2 Branching ratios……………………………………………………………..3-4 Angular distributions………………………………………………………5-7.
HBr, angular distribution analysis E(0) Updated,
CHEMISTRY World of Zumdahl Zumdahl DeCoste. Copyright© by Houghton Mifflin Company. All rights reserved. Chapter 17 Equilibrium.
Chapter 17 Equilibrium. EXIT Copyright © by McDougal Littell. All rights reserved.2 Figure 17.2: (a)Two BrNO molecules approach each other at high speeds.
Vibrationally Driven Hydrogen Abstraction Reaction of Bromine Radical in Solution Jae Yoon Shin, Michael A. Shalowski, F. Fleming Crim OSU International.
HBr, V(m+4) (and E(0)) (Updated ; slide: 24-6) 1)KER spectra vs J´ (slides 2-3) 2)I(H + + Br(1/2))/I(H + + Br(3/2)) vs. J´(slide 4) 3)Comparison.
5.3 Bond Enthalpy. Understanding Bond forming releases energy and bond breaking requires energy. Bonds form because it is energetically favorable to do.
CH3Br, one-color exp.: CHn+, iBr+ and CiBr+ ions vs CH3Br(Ry) states: Content: pages:
CH3Br, (2+n)REMPI spectra assignments for region – cm-1
CH3Br, one-color exp.: CHn+, iBr+ and CiBr+ ions vs CH3Br(Ry) states: Content: pages:
Breaking and making bonds
HBr, Angular distributions for V(m+i), i = 4-10; J´
ASSIGNMENT NO.-2.
Bond enthalpies and mean bond enthalpies
The Formation of Halogenoalkanes
An Overview of Organic Reactions
Characterization of CHBrCl2 photolysis by velocity map imaging
Bond Strength Bond length (the distance between the nuclei of atoms in a covalent bond) decreases with the addition of more shared pairs = stronger bond.
Single Vibronic Level (SVL) emission spectroscopy of CHBr: Vibrational structure of the X1A and a3A  states.
Updated (p:15-16, refs. & p:50-51)
CH3I summary This file includes some ideas about dissociation of
H(0), one-color, VMI and slicing images
Truman Chemistry Department
2 color VMI exp. CH3(X;v1v2v3v4) detection; hi
VMI-fitting results for V(m+i), i=4-10
HBr Mass resolved REMPI and Imaging REMPI.
CH3I summary This file includes some ideas about dissociation of
Photovoltaics solar panels
CH3Br; old data agust,www,...ch3br/PPT aak.ppt
CH3Br Negative particle detections; Electrons /PES:
KER predictions for Br+ images
Electron Transfer in cluster Anions:
Essential Questions What is percent yield and how do you calculate it?
Preview Multiple Choice Short Answer Extended Response
Ionic Addition animation
Radical Reactions.
Similarities Differences
Presentation transcript:

Content: - Comparison of CH3 and CH2 KER - KER assignment for the two color experiment dissociation at 270 nm and probing of CH3 at 329.500 nm (211 transition)

66019 cm-1 (303.000 nm)   CH3 CH2

66503 cm-1 (300.318 nm)   CH3 CH2

67275 cm-1 (297.324 nm) CH3 CH2

68684 cm-1 (291.231 nm) CH3 CH2

72977 cm-1 (274.140 nm) CH3 CH2

74249 cm-1 (269.394 nm) CH3 CH2

75905 cm-1 (263.550 nm) CH3 CH2

77165 cm-1 (259.232 nm) CH3 CH2

78370 cm-1 (255.230 nm) CH3 CH2

79610 cm-1 (251.279 nm) CH3 CH2

Possible explanation for the similarities: CH2+ + e- + HBr CH3++ e- + Br/Br* Angular distribution determining process: 1hni 1hni (?) CH3Br# 1hnpd 1hnpd CH3** + Br/Br* CH2** + HBr ? Dissociation involves one bond break: C-Br Dissociation involves effective „one bond break“: C-H and C-Br broken and H-Br formed CH3Br** 2hnr CH3Br

66019 cm-1 (303.000 nm)   CH3 CH2

66503 cm-1 (300.318 nm)   CH3 CH2

67275 cm-1 (297.324 nm) CH3 CH2

68684 cm-1 (291.231 nm) CH3 CH2

two color experiment – both lasers

two color experiment – probe laser only