Band
Title
1286.0 cm-1: 2ν4 of C2H2 in C2H2 - Metastable phase
Band type
Type
absorption
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
2ν4 bending asym. C2H2 C2H2 -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)
1286 ± 0.5 - - asymmetric 8.0e-04 w 50.0
Band assignment #1
Assignment
Label
2ν4
Category
overtone 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)
2ν4 (bending asym.)       Bond: -C ≡ 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
strongly blended
Peak
1286 ± 0.5 cm-1 (peak)
Evaluation
undefined
Quality
A
Shape
asymmetric
Evaluation
undefined
Quality
undefined
Method
baseline corrected peak intensity
Relative intensity
8.0e-04 ± 1.0e-04
Strength
weak (w)
Evaluation
undefined
Quality
D
Comments
with broad marked shoulders on both sides
Method
width x peak intensity
Evaluation
validated
Quality
undefined
Publication