Copper(II) terephthalate absorbs a large amount of gases such as N-2,
Ar, O-2, and Xe. The maximum amounts of absorption of gases were 1.8,
1.9, 2.2, and 0.9 mole per one mole of the copper(II) salt for N-2, Ar
, O-2, and Xe, respectively, indicating that the gases were not adsorb
ed on the surface but occluded within the solid. The porous structure
of copper(II) terephthalate, in which the gas is occluded, is deduced
from the temperature dependence of magnetic susceptibilities and the l
inear structure of terephthalate.