- Collaboration between Trinuclear Aluminum Complexes Bearing Bipyrazoles in the Ring-Opening Polymerization of ?-Caprolactone
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Trinuclear aluminum complexes bearing bipyrazoles were synthesized, and their catalytic activity for ?-caprolactone (CL) polymerization was investigated. DBu2Al3Me5 exhibited higher catalytic activity than did the dinuclear aluminum complex LBu2Al2Me4 (16
- Chang, Yu-Lun,Chen, Hsuan-Ying,Ding, Shangwu,Kosuru, Someswara Rao,Lai, Feng-Jie,Lai, Yi-Chun,Li, Chen-Yu,Lo, Yung-Han,Wu, Kuo-Hui
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p. 10535 - 10549
(2021/07/28)
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- Metal-directed formation of tetra-, hexa-, octa-, and nonanuclear complexes of magnesium, calcium, manganese, copper, and cadmium
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Reactions of bis-1,3-dicarbonyl compounds H2L (1) with metal dichlorides of cadmium, manganese and calcium in the presence of aqueous ammonia affords octanuclear supramolecular coordination complexes [M8L8]·4Y (2-5), whereas reaction with magnesium dichloride yields an adamantanoid tetranuclear cluster [(4NH4) · (Mg4L6/a)] (6). Treatment of copper dichloride with diethyl ketipinate 1a and sodium hydroxide furnishes the double-/triple-decker metallacoronares [{[Na · (Cu3L3/a)BF4]·THF·H2O}2] (7) and [{Nac · (Cu3L3a)BF4}3·2THF] (8) with an encapsulated sodium ion. Since the 1H and 13C NMR spectra of diamagnetic 2 and 5 and paramagnetic 4, 7 and 8 do not unambiguously establish the exact Structure of these compounds, exemplary X-ray diffraction analyses of 4, 7 and 8 were carried out.
- Saalfrank, Rolf W.,Lo?w, Norbert,Demleitner, Bernhard,Stalke, Dietmar,Teichert, Markus
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p. 1305 - 1311
(2007/10/03)
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