Band
Title
1374.0 cm-1: ν4+ν5 of C2H2 in C2H2 - phase II
Band type
Type
absorption
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
ν4+ν5 unknown combination vibration C2H2 C2H2 -C ≡ C-H
 -C ≡ C-H 		unknown
Characteristics summary
Peak position
(cm-1)		 Center position
(cm-1)		 Width
(cm-1)		 Shape Asymmetry factor Peak intensity
(cm-1)		 Peak intensity relative Peak strength Integrated intensity
(cm-2)		 Integrated intensity relative Integrated strength Temperature
(K)		 Pressure
(bar)
1375 ± 1 - - sharp shoulder 400 ± 100 0.0051 s 20.0
1374 ± 2 - - sharp shoulder 400 ± 100 0.00515 s 65.0
Band assignment #1
Assignment
Label
ν4+ν5
Symmetry
unknown
Category
combination vibration

Evaluation

Level
partly assigned
Evaluation
validated
Comments
Bottger & Eggers 1964
# Multiplicity type Degeneracy Other band
1 unknown
Primary specie
C2H2

Vibration modes

Label (type)
ν4 (bending asym.)       Bond: -C ≡ C-H
ν5 (bending sym. out-p (wagging))       Bond: -C ≡ C-H
Texture
film

Temperature

Temperature
20.0 ± 10.0 K
Temperature max
70.0 K
Method #1
spectrum measurement
Overlap
shoulder-tail
Peak
1375 ± 1 cm-1 (peak)
Evaluation
validated
Quality
B
Shape
sharp shoulder
Evaluation
undefined
Quality
undefined
Method
estimated
Absorption coefficient
400 ± 100 cm-1
Relative intensity
0.0051 ± 0.0013
Strength
strong (s)
Evaluation
undefined
Quality
E
Method
width x peak intensity
Evaluation
validated
Quality
undefined
Texture
film

Temperature

Temperature
65.0 ± 10.0 K
Temperature max
70.0 K
Method #1
spectrum measurement
Overlap
shoulder-tail
Peak
1374 ± 2 cm-1 (peak)
Evaluation
validated
Quality
B
Shape
sharp shoulder
Evaluation
undefined
Quality
undefined
Method
estimated
Absorption coefficient
400 ± 100 cm-1
Relative intensity
0.00515 ± 0.0013
Strength
strong (s)
Evaluation
undefined
Quality
E
Method
width x peak intensity
Evaluation
validated
Quality
undefined
Publications