Gaseous Electronics

105

TETRABROMOETHANE

CONTENTS

105.1 Attachment Rates

105.2 Attachment Cross Sections

References

 

Tetrabromoethane (C₂H₂Br₄), synonym acetylene tetrabromide, is an electron-attaching gas that has 154 electrons. The theoretically calculated electronic polarizability is 10.18 × 10⁻⁴⁰ F m² (Barszczewska et al., 2004) and the dipole moment is 1.38 D.

105.1 ATTACHMENT RATES

The ion species observed is Br⁻. The attachment rate coefficient increases with increasing number of substituted bromine atoms, bromoethane (C₂H₅Br) < dibromoethane (C₂H₄Br₂) < tribromoethane (C₂H₃Br₃) < tetrabromoethane (C₂H₂Br₄) (Sunagawa and Shimamori, 1995). Measured values are shown in Table 105.1 and Figure 105.1.

105.2 ATTACHMENT CROSS SECTIONS

Table 105.2 ...