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Mechanochemically Assisted Synthesis of [EuI 2 (THF) 5 ]I 3 and [EuI 2 (THF)
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The mechanochemical reaction of europium metal and iodine in the presence of small amounts of THF leads to an amorphous yellow–brown powder. The powder is soluble in THF, and from this solution block‐shaped orange crystals of [EuI
2
(THF)
5
]I
3
(
I
, orthorhombic,
Pbcn
,
a
= 12.3916(6),
b
= 21.907(1), and
c
= 11.8575 Å) and yellow needles of [EuI
2
(THF)
5
][EuI
4
(THF)
2
] (
II
, monoclinic,
C
2/
c
,
Z
= 4,
a
= 12.7813(8),
b
= 12.0587(7),
c
= 28.675(2) Å, and
β
= 98.529(2)°) are obtained. Compound
I
shows a linear [EuI
2
]
+
moiety coordinated by five solvent molecules and the well‐known linear I
3
−
ion. In compound
II
, a similar [EuI
2
]
+
unit is surrounded by five THF molecules. In this case, charge balance for the cationic complex is achieved by the [EuI
4
(THF)
2
]
−
anion.
Title: Mechanochemically Assisted Synthesis of [EuI
2
(THF)
5
]I
3
and [EuI
2
(THF)
Description:
The mechanochemical reaction of europium metal and iodine in the presence of small amounts of THF leads to an amorphous yellow–brown powder.
The powder is soluble in THF, and from this solution block‐shaped orange crystals of [EuI
2
(THF)
5
]I
3
(
I
, orthorhombic,
Pbcn
,
a
= 12.
3916(6),
b
= 21.
907(1), and
c
= 11.
8575 Å) and yellow needles of [EuI
2
(THF)
5
][EuI
4
(THF)
2
] (
II
, monoclinic,
C
2/
c
,
Z
= 4,
a
= 12.
7813(8),
b
= 12.
0587(7),
c
= 28.
675(2) Å, and
β
= 98.
529(2)°) are obtained.
Compound
I
shows a linear [EuI
2
]
+
moiety coordinated by five solvent molecules and the well‐known linear I
3
−
ion.
In compound
II
, a similar [EuI
2
]
+
unit is surrounded by five THF molecules.
In this case, charge balance for the cationic complex is achieved by the [EuI
4
(THF)
2
]
−
anion.
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