ISSN:
1573-1111
Keywords:
Polyiodide salts
;
pyridinium pentaiodide
;
β-naphthylammonium pentaiodide
;
N-methyl-γ-picolinium heptaiodide
;
channel inclusion arrangement
;
crystal structure
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The crystal structures of three polyiodode salts are reported (pyridinium pentaiodide, monoclinic,P2 1/m,a=9.221(5),b=12.918(5),c=6.026(4) Å, β=103.60(7)o,Z=2,R F=0.087 for 1187 intensities; β-naphthyl-ammonium pentaiodide, triclinic,173-1,a=10.390(5),b=9.502(5),c=4.462(3) Å, α=99.19(7), β=90.40(7),γ=108.49(8)o,Z=2,R F=0.059 for 1319 intensities;N-methyl-γ-picolinium heptaiodide, monoclinic,C2/c,a=19.315(7),b=12.714(5),c=8.442(4) Å, β=107.26(7)o,Z=4,R F=0.065 for 1336 intensities). All three structures can be described as having channel inclusion features; the cations are contained in channels in polyiodide frameworks based on different arrangements of I2 molecules and I 3 − anions. This structural type is the converse of the more widespread kind where polyiodide anions are contained in an organic matrix (e.g., cyclodextrin polyiodides).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00687991
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