Structure Data of Free Polyatomic Molecules
114
ED, IR
Ce2I6
Cerium triiodide dimer
Di-µ-iodo-tetraiododicerium
C2v assumed
I
ra
Ce–I(t)
Ce–I(b)
Å a)
2.948(9) c)
3.207(238)
θ )
b
I(b)–Ce–I(b)
I(t)–Ce–I(t')
ϕ e)
δ f)
deg
90 d)
114 d)
25 d)
25 d)
I
I
Ce
Ce
I
According to thermodynamic calculations, the vapor over CeI3 consisted of ca. 4.5%
dimeric molecules besides the monomeric form.
The nozzle temperature was 1274 K.
a
) Uncertainties were unidentified, possibly estimated total errors.
) Unidentified, possibly θa.
c
) Assumed to be equal to the monomer
distance, rg value.
d
) Assumed at the estimated value.
e
) Puckering of the ring, see figure.
f
) Angle between the Ce–I(t') bond and the I(b)–Ce–I(b) plane.
b
Molnár, J., Konings, R.J.M., Kolonits, M., Hargittai, M.: J. Mol. Struct. 375 (1996) 223.
Landolt-Börnstein
New Series II/28A
I
I