Band
Title
3877.0 cm-1: ν3+ν4 of C2H2 in C2H2 - Metastable phase
Band type
Type
absorption
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
ν3+ν4 combination vibration C2H2 C2H2 ≥ 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)
3877 ± 2 - - broad shoulder 0.001 w 50.0
Band assignment #1
Assignment
Label
ν3+ν4
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)
ν3 (stretching asym.)       Bond: ≥ C-H
Texture
film

Temperature

Temperature
50.0 ± 5.0 K
Formation temperature
12.0 K
Temperature max
50.0 K
Method #1
spectrum measurement
Overlap
shoulder-tail
Peak
3877 ± 2 cm-1 (estimated)
Evaluation
undefined
Quality
B
Shape
broad shoulder
Evaluation
undefined
Quality
undefined
Comments
broad
Method
estimated
Relative intensity
0.001 ± 5.0e-04
Strength
weak (w)
Evaluation
undefined
Quality
E
Method
width x peak intensity
Evaluation
validated
Quality
undefined
Publication