Synthesis and structure of novel strontium complexes of unsymmetrically functionalized beta-diketimine ligands

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A series of tridentate beta-diketiminate ligands, (2Z, 4E)-4-{[2-(dimethylamino) ethyl] imino}-N-(propan-2-yl) pent-2-en-2-amine ((LH)-H-1), (2Z, 4E)-4-{[3-(dimethylamino) propyl] imino}-N-(tert-butyl) pent-2-en-2-amine ((LH)-H-2), and (2Z, 4E)-4-{[3-(dimethyl-amino) propyl] imino}-N-(propan-2-yl) pent-2-en-2-amine ((LH)-H-3), and their strontium complexes, SrL21 (1), SrL22 (2), and SrL23 (3) were synthesized as potential strontium precursors, by the reaction of Sr[N(SiMe3)(2)](2) and two equivalents of (LH)-H-1, (LH)-H-2, and (LH)-H-3, respectively. Compounds 1-3 were characterized by spectroscopic (IR, MS, H-1 and C-13 NMR), microanalytical methods, and single crystal X-ray diffractometry. The X-ray crystal structure reveals that complex 1 has a monoclinic space group, C2/c. The structure shows the bonding of two beta-diketiminate ligands to the strontium metal through six nitrogen atoms. Additionally, the isopropyl groups on the ligands force 1 to attain a highly distorted octahedron. Thermogravimetric analyses of the compounds 1-3 exhibit a primary mass loss on 130-300 degrees C region. (C) 2011 Elsevier B. V. All rights reserved.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2012-03
Language
English
Article Type
Article
Keywords

ALKALINE-EARTH METALS; SOLUBLE CALCIUM HYDRIDE; SOLID-STATE STRUCTURES; STYRENE POLYMERIZATION; CRYSTALLOGRAPHIC CHARACTERIZATION; INTRAMOLECULAR HYDROAMINATION; CATALYTIC HYDROSILYLATION; BENZYLCALCIUM COMPLEXES; LACTIDE POLYMERIZATION; COORDINATION-COMPLEXES

Citation

INORGANICA CHIMICA ACTA, v.383, pp.67 - 71

ISSN
0020-1693
DOI
10.1016/j.ica.2011.10.044
URI
http://hdl.handle.net/10203/98000
Appears in Collection
CH-Journal Papers(저널논문)
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