Alkali metal induced structural changes in complexes containing anionic lanthanum acryloxide moieties: X-ray crystal structures of (THF)La(OAr){sub 2}({mu}-OAr){sub 2}Li(THF), (THF)La(OAr){sub 2}({mu}-OAr){sub 2}Na(THF){sub 2}, and CsLa(OAr){sub 4} (Ar = 2,6-i-Pr{sub 2}C{sub 6}H{sub 3})
- Los Alamos National Lab., NM (United States); and others
Reaction of La{sub 2}(OAr){sub 6} (1, Ar = 2,6-i-Pr{sub 2}C{sub 6}H{sub 3}) with 2 equiv of LiOAr in THF produces the lanthanum tetrakis-(aryloxide) salt (THF)La(OAr){sub 2}({mu}-OAr){sub 2}Li(THF) (2). A similar reaction employing NaOAr leads to isolation of the analogous sodium salt (THF)La(OAr){sub 2}({mu}-OAr){sub 2}Na(THF){sub 2} (3). 1 reacts with 2 equiv of cesium aryloxide in THF to yield the base-free cesium salt CsLa(OAr){sub 4} (4). Compounds 2, 3, and 4 have been characterized by {sup 1}H NMR and IR spectroscopy, microanalysis, and single-crystal X-ray diffraction studies. The overall molecular geometry of 2 comprises a five-coordinate La metal center coordinated by four aryloxide ligands and one THF ligand in a somewhat distorted trigonal bipyramidal geometry and a three-coordinate Li cation which is coordinated to the oxygen atoms of two aryloxide ligands as well as a single THF ligand.
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 255641
- Journal Information:
- Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 3 Vol. 35; ISSN 0020-1669; ISSN INOCAJ
- Country of Publication:
- United States
- Language:
- English
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