
TY  - JOUR
A1  - Brown, BJ 
T1  - Positron annihilation and electron densities in organic liquids
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1974
VL  - 27
IS  - 5
SP  - 1125
EP  - 1127
KW  - 
UR  - https://doi.org/10.1071/CH9741125 
N2  - The effective electron density for positron annihilation in substituted aliphatic and aromatic liquid compounds has been determined. For the aliphatic hydrocarbons the molecular electron density Ne increases linearly with an increase in chain length and is equal to the sum of the partial electron densities of the substituent methyl (Ne(CH3) = 1.18) and methylene (Ne(CH2) = 1.28) groups.The values are approximately 10% lower for aromatic systems. The partial electron densities of substituted halogen atoms increase with atomic number and are: fluorine (9.3), chlorine (10.0), bromine (14.4) and iodine (23.0). For the aliphatic alcohols the partial Ne(OH) value decreases from 1.35 in methanol to 0.86 in octanol. 
ER  -

