Band
Title
4090.0 cm-1: ν1+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
ν1+ν5 unknown combination vibration C2H2 C2H2 ≥ C-H
 C2H2 		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)
4089 ± 2 - - shoulder 30 ± 15 3.8e-04 m 20.0
4090 ± 2 - - shoulder 40 ± 15 5.2e-04 m 65.0
Band assignment #1
Assignment
Label
ν1+ν5
Symmetry
unknown
Category
combination vibration

Evaluation

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

Vibration modes

Label (type)
ν1 (stretching sym.)       Bond: ≥ C-H
ν5 (bending sym. out-p (wagging))       Bond: C2H2
Texture
film

Temperature

Temperature
20.0 ± 10.0 K
Temperature max
70.0 K
Method #1
spectrum measurement
Overlap
shoulder-tail
Peak
4089 ± 2 cm-1 (peak)
Evaluation
validated
Quality
B
Shape
shoulder
Evaluation
undefined
Quality
undefined
Method
estimated
Absorption coefficient
30 ± 15 cm-1
Relative intensity
3.8e-04 ± 2.0e-04
Strength
medium (m)
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
4090 ± 2 cm-1 (peak)
Evaluation
validated
Quality
B
Shape
shoulder
Evaluation
undefined
Quality
undefined
Method
estimated
Absorption coefficient
40 ± 15 cm-1
Relative intensity
5.2e-04 ± 2.0e-04
Strength
medium (m)
Evaluation
undefined
Quality
E
Method
width x peak intensity
Evaluation
validated
Quality
undefined
Publications