Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 1370-1375 |
| Number of pages | 6 |
| Journal | Inorganica Chimica Acta |
| Volume | 360 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1 Mar 2007 |
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Keywords
- alkali metal
- magnesium
- amide
- agostic
- x-ray crystallography
- heterobimetallic
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Synthesis and structural characterisation of mixed alkalimetal-magnesium mixed ligand alkyl-amido ate complexes. / Andrikopoulos, Prokopis C.; Armstrong, D.R.; Kennedy, A.R.; Mulvey, R.E.; O'Hara, C.T.; Rowlings, Rene; Weatherstone, Susan.
In: Inorganica Chimica Acta, Vol. 360, No. 4, 01.03.2007, p. 1370-1375.Research output: Contribution to journal › Article
TY - JOUR
T1 - Synthesis and structural characterisation of mixed alkalimetal-magnesium mixed ligand alkyl-amido ate complexes
AU - Andrikopoulos, Prokopis C.
AU - Armstrong, D.R.
AU - Kennedy, A.R.
AU - Mulvey, R.E.
AU - O'Hara, C.T.
AU - Rowlings, Rene
AU - Weatherstone, Susan
PY - 2007/3/1
Y1 - 2007/3/1
N2 - Using two different reaction methodologies, two alkali metal–magnesium alkyl bis(amide) complexes were synthesised. First the lithium magnesiate LiMg{μ-N(SiMe3)2}2(tBu) (1) was prepared by combining equimolar quantities of tBuLi and Mg{N(SiMe3)2}2 in hydrocarbon solvent. An X-ray crystallographic study revealed that the asymmetric unit of 1 has a dinuclear arrangement, based on a planar Li–N–Mg–N four-membered ring. As a result of the presence of intermolecular agostic interactions between the Li centre of one asymmetric unit and a methyl group which is resident on the terminal tert-butyl group of another, 1 is polymeric in the solid-state. Second the sodium magnesiate NaMg{μ-N(SiMe3)2}2(tBu) · (OEt2) (2) was prepared by reacting two molar equivalents of Na{N(SiMe3)2} with one molar equivalent of tBuMgCl in hydrocarbon/diethyl ether solution. X-ray crystallographic analysis revealed that the asymmetric unit of 2 consisted of a dinuclear molecular arrangement. As expected it is not polymeric due to the coordination of the Lewis basic ether. Stabilizing intramolecular agostic NaC bonds are observed (where C is a methyl group resident on a Si atom).
AB - Using two different reaction methodologies, two alkali metal–magnesium alkyl bis(amide) complexes were synthesised. First the lithium magnesiate LiMg{μ-N(SiMe3)2}2(tBu) (1) was prepared by combining equimolar quantities of tBuLi and Mg{N(SiMe3)2}2 in hydrocarbon solvent. An X-ray crystallographic study revealed that the asymmetric unit of 1 has a dinuclear arrangement, based on a planar Li–N–Mg–N four-membered ring. As a result of the presence of intermolecular agostic interactions between the Li centre of one asymmetric unit and a methyl group which is resident on the terminal tert-butyl group of another, 1 is polymeric in the solid-state. Second the sodium magnesiate NaMg{μ-N(SiMe3)2}2(tBu) · (OEt2) (2) was prepared by reacting two molar equivalents of Na{N(SiMe3)2} with one molar equivalent of tBuMgCl in hydrocarbon/diethyl ether solution. X-ray crystallographic analysis revealed that the asymmetric unit of 2 consisted of a dinuclear molecular arrangement. As expected it is not polymeric due to the coordination of the Lewis basic ether. Stabilizing intramolecular agostic NaC bonds are observed (where C is a methyl group resident on a Si atom).
KW - alkali metal
KW - magnesium
KW - amide
KW - agostic
KW - x-ray crystallography
KW - heterobimetallic
U2 - 10.1016/j.ica.2006.05.026
DO - 10.1016/j.ica.2006.05.026
M3 - Article
VL - 360
SP - 1370
EP - 1375
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
SN - 0020-1693
IS - 4
ER -