A Tripodal Trisilanol Ligand and Its Complexation Behavior towards Cu I , Cu II , and Zn II
Abstract A three‐step synthetic route for a new tripodal branched trisilanol ligand PhSi(OSiPh 2 OH) 3 ( L H 3 ) was developed. X‐ray diffraction analysis revealed that the trisilanol crystallizes as a dimer with a cyclic hydrogen‐bonding network. The reaction of L H 3 with three equivalents of Cu n...
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| Published in | European journal of inorganic chemistry Vol. 2014; no. 12; pp. 2124 - 2130 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
01.04.2014
|
| Online Access | Get full text |
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| Summary: | Abstract
A three‐step synthetic route for a new tripodal branched trisilanol ligand PhSi(OSiPh
2
OH)
3
(
L
H
3
) was developed. X‐ray diffraction analysis revealed that the trisilanol crystallizes as a dimer with a cyclic hydrogen‐bonding network. The reaction of
L
H
3
with three equivalents of Cu
n
Mes
n
(Mes = mesityl) led to a hexanuclear compound [
L
2
Cu
6
] (
1
), which was characterized by single‐crystal X‐ray diffraction analysis as well as by solution NMR spectroscopy. The crystal structure of
1
revealed that the compound features a hexagonal planar Cu
I
6
ring, which is the first of its kind in an oxygen environment. Deprotonation of the ligand with
n
‐butyllithium and subsequent reaction with CuBr
2
resulted in the dinuclear Cu
II
complex [
L′
2
Cu
2
][Li(THF
2
)]
2
(
2
, THF = tetrahydrofuran), which contains a new siloxide ligand formed from
L
3–
by the elimination of a SiOPh
2
unit, as evidenced by X‐ray diffraction analysis. To check if the “Ph
2
SiO” elimination is a general behavior of this trisilanol, the reaction with ZnBr
2
was investigated under analogous conditions. However, this led to the isolation of [
L
2
Zn
2
][Li(OEt)]
2
(
3
) without any rearrangement of the siloxide ligand. |
|---|---|
| ISSN: | 1434-1948 1099-0682 |
| DOI: | 10.1002/ejic.201400088 |