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On the Reactivity of Lanthanide Iodides LnI x (x < 3) Formed in the Reactions of Lanthanide Metals with Iodine
Author(s) -
Khoroshenkov G. V.,
Petrovskaya T. V.,
Fedushkin I. L.,
Bochkarev M. N.
Publication year - 2002
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/1521-3749(200203)628:3<699::aid-zaac699>3.0.co;2-u
Subject(s) - chemistry , lanthanide , reactivity (psychology) , liquid ammonia , pyrazine , medicinal chemistry , metal , tetra , inorganic chemistry , stereochemistry , ammonia , organic chemistry , ion , medicine , alternative medicine , pathology
The reduced lanthanide iodides of the composition LnI x (Ln = Sc, Y, La, Ce, Pr, Gd, Ho, and Er; x < 3) were obtained by the reaction of an excess of the appropriate metal with iodine at high temperatures. The diamagnetism of the Sc, Y, and La derivatives indicates the trivalent state of the metals in these products. In contrast to the diiodides of Nd(II), Dy(II), and Tm(II), the isolated solids do not dissolve in THF, DME, or liquid ammonia. Despite of their insolubility in THF, all these products readily react in this medium with phenol or alcohols to give the corresponding phenoxy‐ or alkoxylanthanide diiodides ROLnI 2 (THF) x (R = Ph, i‐C 3 H 7 , t‐Bu; x = 2, 3, or 5) in yields up to 55 %. Their interactions with cyclopentadiene in THF afford the complexes CpLnI 2 (THF) 3 with yields up to 60 %. From the reaction of LaI x with 2, 2'‐bipyridine (bipy), the complex LaI 2 (bipy) 2 (THF) 2 was isolated. Triphenylcarbinol, stilbene, naphthalene, and anthracene are inert towards the obtained substances.