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CO Laboratory rotational infrared spectrum

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Presentation on theme: "CO Laboratory rotational infrared spectrum"— Presentation transcript:

1 CO Laboratory rotational infrared spectrum
Harry Kroto 2004

2 U line procedure DeltaF(J) = 2B(J+1) separations =2B (MHz) 106913
-85530 21383 Check: /21383 ca integer !! Good Eh? Prediction - next line at +21383 128296 Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2 U line procedure 10693 85530 Harry Kroto 2004

3 Spacing should be 2B 106913 85530 Harry Kroto 2004

4 106913 85530 21383 106913 Spacing should be 2B 85530 Harry Kroto 2004

5 106913 85530 21383 106913 106913 21383 128296 85530 Harry Kroto 2004

6 Check: 106913/21383 ca integer 4.999906!! Good Eh?
DeltaF(J) = 2B(J+1) separations =2B (MHz) 106913 -85530 21383 Check: /21383 ca integer !! Good Eh? Prediction - next line at +21383 128296 Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2 HOCO+ 128296 J = 4 106913 J = 3 85530 Harry Kroto 2004

7 Harry Kroto 2004

8 106913 85530 21383 Spacing should be 2B 21383 x 5 = 106915 =2B(J+1)
= =2B(J+1) 85530 Harry Kroto 2004

9 Harry Kroto 2004

10 Line separations equidistant at 2B
2B x x x x x x x7 Harry Kroto 2004

11 Line separations equidistant at 2B
= MHz Line separations equidistant at 2B J 2B x x x x x x x7 106913 85530 Harry Kroto 2004

12 Line separations equidistant at 2B
= MHz Line separations equidistant at 2B J 2B x x x x x x x7 106913 85530 Harry Kroto 2004

13 HCO2+ H3O+ Harry Kroto 2004

14 Check: 106913/21383 ca integer 4.999906!! Good Eh?
ΔF(J) = 2B(J+1) separations =2B (MHz) 106913 -85530 21383 Check: /21383 ca integer !! Good Eh? Prediction - next line at +21383 128296 Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2 10693 85530 Harry Kroto 2004

15 Check: 106913/21383 ca integer 4.999906!! Good Eh?
ΔF(J) = 2B(J+1) separations =2B (MHz) 106913 -85530 21383 Check: /21383 ca integer !! Good Eh? Prediction - next line at +21383 128296 Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2 10693 85530 Harry Kroto 2004

16 predict the frequency (in MHz) of the next line to higher frequency.
ΔF(J) = 2B(J+1) Separations = 2B (MHz) MHz MHz Homework Assuming these two interstellar lines are consecutive rotational transitions of a linear molecule: predict the frequency (in MHz) of the next line to higher frequency. Assign the J values of the lines 10693 85530 Harry Kroto 2004

17 Check: 106913/21383 ca integer 4.999906!! Good Eh?
ΔF(J) = 2B(J+1) separations =2B (MHz) 106913 -85530 21383 Check: /21383 ca integer !! Good Eh? Prediction - next line at +21383 128296 Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2 10693 85530 Harry Kroto 2004

18 Check: 106913/21383 ca integer 4.999906!! Good Eh?
ΔF(J) = 2B(J+1) separations =2B (MHz) 106913 -85530 21383 Check: /21383 ca integer !! Good Eh? Prediction - next line at +21383 128296 Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2 106913 85530 Harry Kroto 2004

19 Check: 106913/21383 ca integer 4.999906!! Good Eh?
ΔF(J) = 2B(J+1) separations =2B (MHz) 106913 -85530 21383 Check: /21383 ca integer !! Good Eh? Prediction - next line at +21383 128296 Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2 J = 4 106913 J = 3 85530 Harry Kroto 2004

20 Check: 106913/21383 ca integer 4.999906!! Good Eh?
ΔF(J) = 2B(J+1) separations =2B (MHz) 106913 -85530 21383 Check: /21383 ca integer !! Good Eh? Prediction - next line at +21383 128296 Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2 J = 4 106913 J = 3 85530 Harry Kroto 2004

21 Check: 106913/21383 ca integer 4.999906!! Good Eh?
ΔF(J) = 2B(J+1) separations =2B (MHz) 106913 -85530 21383 Check: /21383 ca integer !! Good Eh? Prediction - next line at +21383 128296 Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2 J = 4 106913 J = 3 85530 Harry Kroto 2004

22 Check: 106913/21383 ca integer 4.999906!! Good Eh?
ΔF(J) = 2B(J+1) separations =2B (MHz) 106913 -85530 21383 Check: /21383 ca integer !! Good Eh? Prediction - next line at +21383 128296 Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2 128296 J = 4 106913 J = 3 85530 Harry Kroto 2004

23 Check: 106913/21383 ca integer 4.999906!! Good Eh?
DeltaF(J) = 2B(J+1) separations =2B (MHz) 106913 -85530 21383 Check: /21383 ca integer !! Good Eh? Prediction - next line at +21383 128296 Structure estimate only H/O/C/N likely so HOCO+ or HOCN most likely actually turned out to be protonated CO2 128296 J = 4 106913 J = 3 85530 Harry Kroto 2004

24 Harry Kroto 2004

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